From da962b71758d52b38a4ed89380d296ed25920d18 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Beno=C3=AEt=20Th=C3=A9baudeau?= Date: Thu, 11 Apr 2013 09:35:51 +0000 Subject: nand: mxc: Switch NAND SPL to generic SPL MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This also fixes support for mx31pdk and tx25, which had been broken by commit e05e5de7fae5bec79617e113916dac6631251156. Signed-off-by: Benoît Thébaudeau Acked-by: Scott Wood Tested-by: Fabio Estevam diff --git a/arch/arm/cpu/arm926ejs/start.S b/arch/arm/cpu/arm926ejs/start.S index 552279f..0a9cf1d 100644 --- a/arch/arm/cpu/arm926ejs/start.S +++ b/arch/arm/cpu/arm926ejs/start.S @@ -200,7 +200,6 @@ reset: /*------------------------------------------------------------------------------*/ -#if !defined(CONFIG_SPL_BUILD) || defined(CONFIG_NAND_SPL) /* * void relocate_code (addr_sp, gd, addr_moni) * @@ -269,6 +268,8 @@ relocate_done: bx lr +#ifndef CONFIG_SPL_BUILD + _rel_dyn_start_ofs: .word __rel_dyn_start - _start _rel_dyn_end_ofs: diff --git a/board/freescale/mx31pdk/Makefile b/board/freescale/mx31pdk/Makefile index 5b7cafd..b910722 100644 --- a/board/freescale/mx31pdk/Makefile +++ b/board/freescale/mx31pdk/Makefile @@ -27,6 +27,9 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(BOARD).o +ifdef CONFIG_SPL_BUILD +SOBJS := lowlevel_init.o +endif COBJS := mx31pdk.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/board/freescale/mx31pdk/config.mk b/board/freescale/mx31pdk/config.mk deleted file mode 100644 index de2c642..0000000 --- a/board/freescale/mx31pdk/config.mk +++ /dev/null @@ -1,5 +0,0 @@ -ifdef CONFIG_NAND_SPL -CONFIG_SYS_TEXT_BASE = 0x87ec0000 -else -CONFIG_SYS_TEXT_BASE = 0x87f00000 -endif diff --git a/board/freescale/mx31pdk/mx31pdk.c b/board/freescale/mx31pdk/mx31pdk.c index 895396c..3d0d419 100644 --- a/board/freescale/mx31pdk/mx31pdk.c +++ b/board/freescale/mx31pdk/mx31pdk.c @@ -36,6 +36,14 @@ DECLARE_GLOBAL_DATA_PTR; +#ifdef CONFIG_SPL_BUILD +void board_init_f(ulong bootflag) +{ + relocate_code(0, NULL, CONFIG_SPL_TEXT_BASE); + asm volatile("ldr pc, =nand_boot"); +} +#endif + int dram_init(void) { /* dram_init must store complete ramsize in gd->ram_size */ diff --git a/board/karo/tx25/Makefile b/board/karo/tx25/Makefile index 9617fa5..c26bf36 100644 --- a/board/karo/tx25/Makefile +++ b/board/karo/tx25/Makefile @@ -25,8 +25,10 @@ include $(TOPDIR)/config.mk LIB = $(obj)lib$(BOARD).o -COBJS := tx25.o +ifdef CONFIG_SPL_BUILD SOBJS := lowlevel_init.o +endif +COBJS := tx25.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) OBJS := $(addprefix $(obj),$(COBJS)) diff --git a/board/karo/tx25/config.mk b/board/karo/tx25/config.mk deleted file mode 100644 index 18b2883..0000000 --- a/board/karo/tx25/config.mk +++ /dev/null @@ -1,5 +0,0 @@ -ifdef CONFIG_NAND_SPL -CONFIG_SYS_TEXT_BASE = 0x810c0000 -else -CONFIG_SYS_TEXT_BASE = 0x81200000 -endif diff --git a/board/karo/tx25/tx25.c b/board/karo/tx25/tx25.c index 362f00a..69ee590 100644 --- a/board/karo/tx25/tx25.c +++ b/board/karo/tx25/tx25.c @@ -33,6 +33,14 @@ DECLARE_GLOBAL_DATA_PTR; +#ifdef CONFIG_SPL_BUILD +void board_init_f(ulong bootflag) +{ + relocate_code(0, NULL, CONFIG_SPL_TEXT_BASE); + asm volatile("ldr pc, =nand_boot"); +} +#endif + #ifdef CONFIG_FEC_MXC #define GPIO_FEC_RESET_B IMX_GPIO_NR(4, 7) #define GPIO_FEC_ENABLE_B IMX_GPIO_NR(4, 9) diff --git a/boards.cfg b/boards.cfg index 1acf56a..860d8f1 100644 --- a/boards.cfg +++ b/boards.cfg @@ -45,7 +45,7 @@ imx31_phycore arm arm1136 - - imx31_phycore_eet arm arm1136 imx31_phycore - mx31 imx31_phycore:IMX31_PHYCORE_EET qong arm arm1136 - davedenx mx31 mx31ads arm arm1136 - freescale mx31 -mx31pdk arm arm1136 - freescale mx31 mx31pdk:NAND_U_BOOT +mx31pdk arm arm1136 - freescale mx31 tt01 arm arm1136 - hale mx31 imx31_litekit arm arm1136 - logicpd mx31 flea3 arm arm1136 - CarMediaLab mx35 diff --git a/doc/README.arm-relocation b/doc/README.arm-relocation index 5a9a2fb..645b374 100644 --- a/doc/README.arm-relocation +++ b/doc/README.arm-relocation @@ -40,15 +40,15 @@ Boards which are not fixed to support relocation will be REMOVED! ----------------------------------------------------------------------------- -For boards which boot from nand_spl, it is possible to save one copy +For boards which boot from spl, it is possible to save one copy if CONFIG_SYS_TEXT_BASE == relocation address! This prevents that uboot code is copied again in relocate_code(). -example for the tx25 board: +example for the tx25 board booting from NAND Flash: a) cpu starts b) it copies the first page in nand to internal ram - (nand_spl_code) + (spl code) c) end executes this code d) this initialize CPU, RAM, ... and copy itself to RAM (this bin must fit in one page, so board_init_f() @@ -79,20 +79,20 @@ TODO ----------------------------------------------------------------------------- -Relocation with NAND_SPL (example for the tx25): +Relocation with SPL (example for the tx25 booting from NAND Flash): - cpu copies the first page from NAND to 0xbb000000 (IMX_NFC_BASE) and start with code execution on this address. -- The First page contains u-boot code from u-boot:nand_spl/nand_boot_fsl_nfc.c - which inits the dram, cpu registers, reloacte itself to CONFIG_SYS_TEXT_BASE and loads +- The First page contains u-boot code from drivers/mtd/nand/mxc_nand_spl.c + which inits the dram, cpu registers, reloacte itself to CONFIG_SPL_TEXT_BASE and loads the "real" u-boot to CONFIG_SYS_NAND_U_BOOT_DST and starts execution @CONFIG_SYS_NAND_U_BOOT_START - This u-boot does no RAM init, nor CPU register setup. Just look where it has to copy and relocate itself to this address. If relocate address = CONFIG_SYS_TEXT_BASE (not the same, as the - CONFIG_SYS_TEXT_BASE from the nand_spl code), then there is no need + CONFIG_SPL_TEXT_BASE from the spl code), then there is no need to copy, just go on with bss clear and jump to board_init_r. ----------------------------------------------------------------------------- diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile index c77c0c4..bcb7161 100644 --- a/drivers/mtd/nand/Makefile +++ b/drivers/mtd/nand/Makefile @@ -82,6 +82,7 @@ COBJS-$(CONFIG_NAND_PLAT) += nand_plat.o else # minimal SPL drivers COBJS-$(CONFIG_NAND_FSL_ELBC) += fsl_elbc_spl.o +COBJS-$(CONFIG_NAND_MXC) += mxc_nand_spl.o endif # drivers endif # nand diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c index 29ceab3..507bbc2 100644 --- a/drivers/mtd/nand/mxc_nand.c +++ b/drivers/mtd/nand/mxc_nand.c @@ -26,7 +26,7 @@ defined(CONFIG_MX51) || defined(CONFIG_MX53) #include #endif -#include +#include "mxc_nand.h" #define DRIVER_NAME "mxc_nand" @@ -36,9 +36,9 @@ struct mxc_nand_host { struct mtd_info mtd; struct nand_chip *nand; - struct fsl_nfc_regs __iomem *regs; + struct mxc_nand_regs __iomem *regs; #ifdef MXC_NFC_V3_2 - struct fsl_nfc_ip_regs __iomem *ip_regs; + struct mxc_nand_ip_regs __iomem *ip_regs; #endif int spare_only; int status_request; @@ -1213,10 +1213,10 @@ int board_nand_init(struct nand_chip *this) this->read_buf = mxc_nand_read_buf; this->verify_buf = mxc_nand_verify_buf; - host->regs = (struct fsl_nfc_regs __iomem *)CONFIG_MXC_NAND_REGS_BASE; + host->regs = (struct mxc_nand_regs __iomem *)CONFIG_MXC_NAND_REGS_BASE; #ifdef MXC_NFC_V3_2 host->ip_regs = - (struct fsl_nfc_ip_regs __iomem *)CONFIG_MXC_NAND_IP_REGS_BASE; + (struct mxc_nand_ip_regs __iomem *)CONFIG_MXC_NAND_IP_REGS_BASE; #endif host->clk_act = 1; diff --git a/drivers/mtd/nand/mxc_nand.h b/drivers/mtd/nand/mxc_nand.h new file mode 100644 index 0000000..308ff8d --- /dev/null +++ b/drivers/mtd/nand/mxc_nand.h @@ -0,0 +1,225 @@ +/* + * (c) 2009 Magnus Lilja + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#ifndef __MXC_NAND_H +#define __MXC_NAND_H + +/* + * Register map and bit definitions for the Freescale NAND Flash Controller + * present in various i.MX devices. + * + * MX31 and MX27 have version 1, which has: + * 4 512-byte main buffers and + * 4 16-byte spare buffers + * to support up to 2K byte pagesize nand. + * Reading or writing a 2K page requires 4 FDI/FDO cycles. + * + * MX25 and MX35 have version 2.1, and MX51 and MX53 have version 3.2, which + * have: + * 8 512-byte main buffers and + * 8 64-byte spare buffers + * to support up to 4K byte pagesize nand. + * Reading or writing a 2K or 4K page requires only 1 FDI/FDO cycle. + * Also some of registers are moved and/or changed meaning as seen below. + */ +#if defined(CONFIG_MX27) || defined(CONFIG_MX31) +#define MXC_NFC_V1 +#define is_mxc_nfc_1() 1 +#define is_mxc_nfc_21() 0 +#define is_mxc_nfc_32() 0 +#elif defined(CONFIG_MX25) || defined(CONFIG_MX35) +#define MXC_NFC_V2_1 +#define is_mxc_nfc_1() 0 +#define is_mxc_nfc_21() 1 +#define is_mxc_nfc_32() 0 +#elif defined(CONFIG_MX51) || defined(CONFIG_MX53) +#define MXC_NFC_V3 +#define MXC_NFC_V3_2 +#define is_mxc_nfc_1() 0 +#define is_mxc_nfc_21() 0 +#define is_mxc_nfc_32() 1 +#else +#error "MXC NFC implementation not supported" +#endif +#define is_mxc_nfc_3() is_mxc_nfc_32() + +#if defined(MXC_NFC_V1) +#define NAND_MXC_NR_BUFS 4 +#define NAND_MXC_SPARE_BUF_SIZE 16 +#define NAND_MXC_REG_OFFSET 0xe00 +#define NAND_MXC_2K_MULTI_CYCLE +#elif defined(MXC_NFC_V2_1) || defined(MXC_NFC_V3_2) +#define NAND_MXC_NR_BUFS 8 +#define NAND_MXC_SPARE_BUF_SIZE 64 +#define NAND_MXC_REG_OFFSET 0x1e00 +#endif + +struct mxc_nand_regs { + u8 main_area[NAND_MXC_NR_BUFS][0x200]; + u8 spare_area[NAND_MXC_NR_BUFS][NAND_MXC_SPARE_BUF_SIZE]; + /* + * reserved size is offset of nfc registers + * minus total main and spare sizes + */ + u8 reserved1[NAND_MXC_REG_OFFSET + - NAND_MXC_NR_BUFS * (512 + NAND_MXC_SPARE_BUF_SIZE)]; +#if defined(MXC_NFC_V1) + u16 buf_size; + u16 reserved2; + u16 buf_addr; + u16 flash_addr; + u16 flash_cmd; + u16 config; + u16 ecc_status_result; + u16 rsltmain_area; + u16 rsltspare_area; + u16 wrprot; + u16 unlockstart_blkaddr; + u16 unlockend_blkaddr; + u16 nf_wrprst; + u16 config1; + u16 config2; +#elif defined(MXC_NFC_V2_1) + u16 reserved2[2]; + u16 buf_addr; + u16 flash_addr; + u16 flash_cmd; + u16 config; + u32 ecc_status_result; + u16 spare_area_size; + u16 wrprot; + u16 reserved3[2]; + u16 nf_wrprst; + u16 config1; + u16 config2; + u16 reserved4; + u16 unlockstart_blkaddr; + u16 unlockend_blkaddr; + u16 unlockstart_blkaddr1; + u16 unlockend_blkaddr1; + u16 unlockstart_blkaddr2; + u16 unlockend_blkaddr2; + u16 unlockstart_blkaddr3; + u16 unlockend_blkaddr3; +#elif defined(MXC_NFC_V3_2) + u32 flash_cmd; + u32 flash_addr[12]; + u32 config1; + u32 ecc_status_result; + u32 status_sum; + u32 launch; +#endif +}; + +#ifdef MXC_NFC_V3_2 +struct mxc_nand_ip_regs { + u32 wrprot; + u32 wrprot_unlock_blkaddr[8]; + u32 config2; + u32 config3; + u32 ipc; + u32 err_addr; + u32 delay_line; +}; +#endif + +/* Set FCMD to 1, rest to 0 for Command operation */ +#define NFC_CMD 0x1 + +/* Set FADD to 1, rest to 0 for Address operation */ +#define NFC_ADDR 0x2 + +/* Set FDI to 1, rest to 0 for Input operation */ +#define NFC_INPUT 0x4 + +/* Set FDO to 001, rest to 0 for Data Output operation */ +#define NFC_OUTPUT 0x8 + +/* Set FDO to 010, rest to 0 for Read ID operation */ +#define NFC_ID 0x10 + +/* Set FDO to 100, rest to 0 for Read Status operation */ +#define NFC_STATUS 0x20 + +#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) +#define NFC_CONFIG1_SP_EN (1 << 2) +#define NFC_CONFIG1_RST (1 << 6) +#define NFC_CONFIG1_CE (1 << 7) +#elif defined(MXC_NFC_V3_2) +#define NFC_CONFIG1_SP_EN (1 << 0) +#define NFC_CONFIG1_CE (1 << 1) +#define NFC_CONFIG1_RST (1 << 2) +#endif +#define NFC_V1_V2_CONFIG1_ECC_EN (1 << 3) +#define NFC_V1_V2_CONFIG1_INT_MSK (1 << 4) +#define NFC_V1_V2_CONFIG1_BIG (1 << 5) +#define NFC_V2_CONFIG1_ECC_MODE_4 (1 << 0) +#define NFC_V2_CONFIG1_ONE_CYCLE (1 << 8) +#define NFC_V2_CONFIG1_FP_INT (1 << 11) +#define NFC_V3_CONFIG1_RBA_MASK (0x7 << 4) +#define NFC_V3_CONFIG1_RBA(x) (((x) & 0x7) << 4) + +#define NFC_V1_V2_CONFIG2_INT (1 << 15) +#define NFC_V3_CONFIG2_PS_MASK (0x3 << 0) +#define NFC_V3_CONFIG2_PS_512 (0 << 0) +#define NFC_V3_CONFIG2_PS_2048 (1 << 0) +#define NFC_V3_CONFIG2_PS_4096 (2 << 0) +#define NFC_V3_CONFIG2_ONE_CYCLE (1 << 2) +#define NFC_V3_CONFIG2_ECC_EN (1 << 3) +#define NFC_V3_CONFIG2_2CMD_PHASES (1 << 4) +#define NFC_V3_CONFIG2_NUM_ADDR_PH0 (1 << 5) +#define NFC_V3_CONFIG2_ECC_MODE_8 (1 << 6) +#define NFC_V3_CONFIG2_PPB_MASK (0x3 << 7) +#define NFC_V3_CONFIG2_PPB(x) (((x) & 0x3) << 7) +#define NFC_V3_CONFIG2_EDC_MASK (0x7 << 9) +#define NFC_V3_CONFIG2_EDC(x) (((x) & 0x7) << 9) +#define NFC_V3_CONFIG2_NUM_ADDR_PH1(x) (((x) & 0x3) << 12) +#define NFC_V3_CONFIG2_INT_MSK (1 << 15) +#define NFC_V3_CONFIG2_SPAS_MASK (0xff << 16) +#define NFC_V3_CONFIG2_SPAS(x) (((x) & 0xff) << 16) +#define NFC_V3_CONFIG2_ST_CMD_MASK (0xff << 24) +#define NFC_V3_CONFIG2_ST_CMD(x) (((x) & 0xff) << 24) + +#define NFC_V3_CONFIG3_ADD_OP(x) (((x) & 0x3) << 0) +#define NFC_V3_CONFIG3_FW8 (1 << 3) +#define NFC_V3_CONFIG3_SBB(x) (((x) & 0x7) << 8) +#define NFC_V3_CONFIG3_NUM_OF_DEVS(x) (((x) & 0x7) << 12) +#define NFC_V3_CONFIG3_RBB_MODE (1 << 15) +#define NFC_V3_CONFIG3_NO_SDMA (1 << 20) + +#define NFC_V3_WRPROT_UNLOCK (1 << 2) +#define NFC_V3_WRPROT_BLS_UNLOCK (2 << 6) + +#define NFC_V3_IPC_CREQ (1 << 0) +#define NFC_V3_IPC_INT (1 << 31) + +#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) +#define operation config2 +#define readnfc readw +#define writenfc writew +#elif defined(MXC_NFC_V3_2) +#define operation launch +#define readnfc readl +#define writenfc writel +#endif + +#endif /* __MXC_NAND_H */ diff --git a/drivers/mtd/nand/mxc_nand_spl.c b/drivers/mtd/nand/mxc_nand_spl.c new file mode 100644 index 0000000..09f23c3 --- /dev/null +++ b/drivers/mtd/nand/mxc_nand_spl.c @@ -0,0 +1,366 @@ +/* + * (C) Copyright 2009 + * Magnus Lilja + * + * (C) Copyright 2008 + * Maxim Artamonov, + * + * (C) Copyright 2006-2008 + * Stefan Roese, DENX Software Engineering, sr at denx.de. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include "mxc_nand.h" + +#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) +static struct mxc_nand_regs *const nfc = (void *)NFC_BASE_ADDR; +#elif defined(MXC_NFC_V3_2) +static struct mxc_nand_regs *const nfc = (void *)NFC_BASE_ADDR_AXI; +static struct mxc_nand_ip_regs *const nfc_ip = (void *)NFC_BASE_ADDR; +#endif + +static void nfc_wait_ready(void) +{ + uint32_t tmp; + +#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) + while (!(readnfc(&nfc->config2) & NFC_V1_V2_CONFIG2_INT)) + ; + + /* Reset interrupt flag */ + tmp = readnfc(&nfc->config2); + tmp &= ~NFC_V1_V2_CONFIG2_INT; + writenfc(tmp, &nfc->config2); +#elif defined(MXC_NFC_V3_2) + while (!(readnfc(&nfc_ip->ipc) & NFC_V3_IPC_INT)) + ; + + /* Reset interrupt flag */ + tmp = readnfc(&nfc_ip->ipc); + tmp &= ~NFC_V3_IPC_INT; + writenfc(tmp, &nfc_ip->ipc); +#endif +} + +static void nfc_nand_init(void) +{ +#if defined(MXC_NFC_V3_2) + int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512; + int tmp; + + tmp = (readnfc(&nfc_ip->config2) & ~(NFC_V3_CONFIG2_SPAS_MASK | + NFC_V3_CONFIG2_EDC_MASK | NFC_V3_CONFIG2_PS_MASK)) | + NFC_V3_CONFIG2_SPAS(CONFIG_SYS_NAND_OOBSIZE / 2) | + NFC_V3_CONFIG2_INT_MSK | NFC_V3_CONFIG2_ECC_EN | + NFC_V3_CONFIG2_ONE_CYCLE; + if (CONFIG_SYS_NAND_PAGE_SIZE == 4096) + tmp |= NFC_V3_CONFIG2_PS_4096; + else if (CONFIG_SYS_NAND_PAGE_SIZE == 2048) + tmp |= NFC_V3_CONFIG2_PS_2048; + else if (CONFIG_SYS_NAND_PAGE_SIZE == 512) + tmp |= NFC_V3_CONFIG2_PS_512; + /* + * if spare size is larger that 16 bytes per 512 byte hunk + * then use 8 symbol correction instead of 4 + */ + if (CONFIG_SYS_NAND_OOBSIZE / ecc_per_page > 16) + tmp |= NFC_V3_CONFIG2_ECC_MODE_8; + else + tmp &= ~NFC_V3_CONFIG2_ECC_MODE_8; + writenfc(tmp, &nfc_ip->config2); + + tmp = NFC_V3_CONFIG3_NUM_OF_DEVS(0) | + NFC_V3_CONFIG3_NO_SDMA | + NFC_V3_CONFIG3_RBB_MODE | + NFC_V3_CONFIG3_SBB(6) | /* Reset default */ + NFC_V3_CONFIG3_ADD_OP(0); +#ifndef CONFIG_SYS_NAND_BUSWIDTH_16 + tmp |= NFC_V3_CONFIG3_FW8; +#endif + writenfc(tmp, &nfc_ip->config3); + + writenfc(0, &nfc_ip->delay_line); +#elif defined(MXC_NFC_V2_1) + int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512; + int config1; + + writenfc(CONFIG_SYS_NAND_OOBSIZE / 2, &nfc->spare_area_size); + + /* unlocking RAM Buff */ + writenfc(0x2, &nfc->config); + + /* hardware ECC checking and correct */ + config1 = readnfc(&nfc->config1) | NFC_V1_V2_CONFIG1_ECC_EN | + NFC_V1_V2_CONFIG1_INT_MSK | NFC_V2_CONFIG1_ONE_CYCLE | + NFC_V2_CONFIG1_FP_INT; + /* + * if spare size is larger that 16 bytes per 512 byte hunk + * then use 8 symbol correction instead of 4 + */ + if (CONFIG_SYS_NAND_OOBSIZE / ecc_per_page > 16) + config1 &= ~NFC_V2_CONFIG1_ECC_MODE_4; + else + config1 |= NFC_V2_CONFIG1_ECC_MODE_4; + writenfc(config1, &nfc->config1); +#elif defined(MXC_NFC_V1) + /* unlocking RAM Buff */ + writenfc(0x2, &nfc->config); + + /* hardware ECC checking and correct */ + writenfc(NFC_V1_V2_CONFIG1_ECC_EN | NFC_V1_V2_CONFIG1_INT_MSK, + &nfc->config1); +#endif +} + +static void nfc_nand_command(unsigned short command) +{ + writenfc(command, &nfc->flash_cmd); + writenfc(NFC_CMD, &nfc->operation); + nfc_wait_ready(); +} + +static void nfc_nand_address(unsigned short address) +{ + writenfc(address, &nfc->flash_addr); + writenfc(NFC_ADDR, &nfc->operation); + nfc_wait_ready(); +} + +static void nfc_nand_page_address(unsigned int page_address) +{ + unsigned int page_count; + + nfc_nand_address(0x00); + + /* code only for large page flash */ + if (CONFIG_SYS_NAND_PAGE_SIZE > 512) + nfc_nand_address(0x00); + + page_count = CONFIG_SYS_NAND_SIZE / CONFIG_SYS_NAND_PAGE_SIZE; + + if (page_address <= page_count) { + page_count--; /* transform 0x01000000 to 0x00ffffff */ + do { + nfc_nand_address(page_address & 0xff); + page_address = page_address >> 8; + page_count = page_count >> 8; + } while (page_count); + } + + nfc_nand_address(0x00); +} + +static void nfc_nand_data_output(void) +{ +#ifdef NAND_MXC_2K_MULTI_CYCLE + int i; +#endif + +#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) + writenfc(0, &nfc->buf_addr); +#elif defined(MXC_NFC_V3_2) + int config1 = readnfc(&nfc->config1); + config1 &= ~NFC_V3_CONFIG1_RBA_MASK; + writenfc(config1, &nfc->config1); +#endif + writenfc(NFC_OUTPUT, &nfc->operation); + nfc_wait_ready(); +#ifdef NAND_MXC_2K_MULTI_CYCLE + /* + * This NAND controller requires multiple input commands + * for pages larger than 512 bytes. + */ + for (i = 1; i < CONFIG_SYS_NAND_PAGE_SIZE / 512; i++) { + writenfc(i, &nfc->buf_addr); + writenfc(NFC_OUTPUT, &nfc->operation); + nfc_wait_ready(); + } +#endif +} + +static int nfc_nand_check_ecc(void) +{ +#if defined(MXC_NFC_V1) + u16 ecc_status = readw(&nfc->ecc_status_result); + return (ecc_status & 0x3) == 2 || (ecc_status >> 2) == 2; +#elif defined(MXC_NFC_V2_1) || defined(MXC_NFC_V3_2) + u32 ecc_status = readl(&nfc->ecc_status_result); + int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512; + int err_limit = CONFIG_SYS_NAND_OOBSIZE / ecc_per_page > 16 ? 8 : 4; + int subpages = CONFIG_SYS_NAND_PAGE_SIZE / 512; + + do { + if ((ecc_status & 0xf) > err_limit) + return 1; + ecc_status >>= 4; + } while (--subpages); + + return 0; +#endif +} + +static void nfc_nand_read_page(unsigned int page_address) +{ + /* read in first 0 buffer */ +#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) + writenfc(0, &nfc->buf_addr); +#elif defined(MXC_NFC_V3_2) + int config1 = readnfc(&nfc->config1); + config1 &= ~NFC_V3_CONFIG1_RBA_MASK; + writenfc(config1, &nfc->config1); +#endif + nfc_nand_command(NAND_CMD_READ0); + nfc_nand_page_address(page_address); + + if (CONFIG_SYS_NAND_PAGE_SIZE > 512) + nfc_nand_command(NAND_CMD_READSTART); + + nfc_nand_data_output(); /* fill the main buffer 0 */ +} + +static int nfc_read_page(unsigned int page_address, unsigned char *buf) +{ + int i; + u32 *src; + u32 *dst; + + nfc_nand_read_page(page_address); + + if (nfc_nand_check_ecc()) + return -1; + + src = (u32 *)&nfc->main_area[0][0]; + dst = (u32 *)buf; + + /* main copy loop from NAND-buffer to SDRAM memory */ + for (i = 0; i < CONFIG_SYS_NAND_PAGE_SIZE / 4; i++) { + writel(readl(src), dst); + src++; + dst++; + } + + return 0; +} + +static int is_badblock(int pagenumber) +{ + int page = pagenumber; + u32 badblock; + u32 *src; + + /* Check the first two pages for bad block markers */ + for (page = pagenumber; page < pagenumber + 2; page++) { + nfc_nand_read_page(page); + + src = (u32 *)&nfc->spare_area[0][0]; + + /* + * IMPORTANT NOTE: The nand flash controller uses a non- + * standard layout for large page devices. This can + * affect the position of the bad block marker. + */ + /* Get the bad block marker */ + badblock = readl(&src[CONFIG_SYS_NAND_BAD_BLOCK_POS / 4]); + badblock >>= 8 * (CONFIG_SYS_NAND_BAD_BLOCK_POS % 4); + badblock &= 0xff; + + /* bad block marker verify */ + if (badblock != 0xff) + return 1; /* potential bad block */ + } + + return 0; +} + +static int nand_load(unsigned int from, unsigned int size, unsigned char *buf) +{ + int i; + unsigned int page; + unsigned int maxpages = CONFIG_SYS_NAND_SIZE / + CONFIG_SYS_NAND_PAGE_SIZE; + + nfc_nand_init(); + + /* Convert to page number */ + page = from / CONFIG_SYS_NAND_PAGE_SIZE; + i = 0; + + while (i < size / CONFIG_SYS_NAND_PAGE_SIZE) { + if (nfc_read_page(page, buf) < 0) + return -1; + + page++; + i++; + buf = buf + CONFIG_SYS_NAND_PAGE_SIZE; + + /* + * Check if we have crossed a block boundary, and if so + * check for bad block. + */ + if (!(page % CONFIG_SYS_NAND_PAGE_COUNT)) { + /* + * Yes, new block. See if this block is good. If not, + * loop until we find a good block. + */ + while (is_badblock(page)) { + page = page + CONFIG_SYS_NAND_PAGE_COUNT; + /* Check i we've reached the end of flash. */ + if (page >= maxpages) + return -1; + } + } + } + + return 0; +} + +/* + * The main entry for NAND booting. It's necessary that SDRAM is already + * configured and available since this code loads the main U-Boot image + * from NAND into SDRAM and starts it from there. + */ +void nand_boot(void) +{ + __attribute__((noreturn)) void (*uboot)(void); + + /* + * CONFIG_SYS_NAND_U_BOOT_OFFS and CONFIG_SYS_NAND_U_BOOT_SIZE must + * be aligned to full pages + */ + if (!nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE, + (uchar *)CONFIG_SYS_NAND_U_BOOT_DST)) { + /* Copy from NAND successful, start U-boot */ + uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START; + uboot(); + } else { + /* Unrecoverable error when copying from NAND */ + hang(); + } +} + +/* + * Called in case of an exception. + */ +void hang(void) +{ + /* Loop forever */ + while (1) ; +} diff --git a/include/configs/mx31pdk.h b/include/configs/mx31pdk.h index 34e4295..80ec08e 100644 --- a/include/configs/mx31pdk.h +++ b/include/configs/mx31pdk.h @@ -45,7 +45,16 @@ #define CONFIG_MACH_TYPE MACH_TYPE_MX31_3DS -#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL) +#define CONFIG_SPL +#define CONFIG_SPL_TARGET "u-boot-with-spl.bin" +#define CONFIG_SPL_LDSCRIPT "arch/$(ARCH)/cpu/u-boot-spl.lds" +#define CONFIG_SPL_MAX_SIZE 2048 +#define CONFIG_SPL_NAND_SUPPORT + +#define CONFIG_SPL_TEXT_BASE 0x87dc0000 +#define CONFIG_SYS_TEXT_BASE 0x87e00000 + +#ifndef CONFIG_SPL_BUILD #define CONFIG_SKIP_LOWLEVEL_INIT #endif @@ -116,7 +125,7 @@ "bootcmd=run bootcmd_net\0" \ "bootcmd_net=run bootargs_base bootargs_mtd bootargs_nfs; " \ "tftpboot 0x81000000 uImage-mx31; bootm\0" \ - "prg_uboot=tftpboot 0x81000000 u-boot-nand.bin; " \ + "prg_uboot=tftpboot 0x81000000 u-boot-with-spl.bin; " \ "nand erase 0x0 0x40000; " \ "nand write 0x81000000 0x0 0x40000\0" @@ -163,7 +172,7 @@ #define CONFIG_SYS_GBL_DATA_OFFSET (CONFIG_SYS_INIT_RAM_SIZE - \ GENERATED_GBL_DATA_SIZE) #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_INIT_RAM_ADDR + \ - CONFIG_SYS_GBL_DATA_OFFSET) + CONFIG_SYS_INIT_RAM_SIZE) /*----------------------------------------------------------------------- * FLASH and environment organization @@ -189,10 +198,10 @@ /* NAND configuration for the NAND_SPL */ /* Start copying real U-boot from the second page */ -#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x800 -#define CONFIG_SYS_NAND_U_BOOT_SIZE 0x30000 +#define CONFIG_SYS_NAND_U_BOOT_OFFS CONFIG_SPL_PAD_TO +#define CONFIG_SYS_NAND_U_BOOT_SIZE 0x3f800 /* Load U-Boot to this address */ -#define CONFIG_SYS_NAND_U_BOOT_DST 0x87f00000 +#define CONFIG_SYS_NAND_U_BOOT_DST CONFIG_SYS_TEXT_BASE #define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_NAND_U_BOOT_DST #define CONFIG_SYS_NAND_PAGE_SIZE 0x800 diff --git a/include/configs/tx25.h b/include/configs/tx25.h index 80194d8..e72f8f6 100644 --- a/include/configs/tx25.h +++ b/include/configs/tx25.h @@ -21,6 +21,7 @@ #ifndef __CONFIG_H #define __CONFIG_H +#include /* * KARO TX25 board - SoC Configuration @@ -31,8 +32,14 @@ #define CONFIG_SYS_MONITOR_LEN (256 << 10) /* 256 kB for U-Boot */ -/* NAND BOOT is the only boot method */ -#define CONFIG_NAND_U_BOOT +#define CONFIG_SPL +#define CONFIG_SPL_TARGET "u-boot-with-spl.bin" +#define CONFIG_SPL_LDSCRIPT "arch/$(ARCH)/cpu/u-boot-spl.lds" +#define CONFIG_SPL_MAX_SIZE 2048 +#define CONFIG_SPL_NAND_SUPPORT + +#define CONFIG_SPL_TEXT_BASE 0x810c0000 +#define CONFIG_SYS_TEXT_BASE 0x81200000 #ifndef MACH_TYPE_TX25 #define MACH_TYPE_TX25 2177 @@ -40,16 +47,16 @@ #define CONFIG_MACH_TYPE MACH_TYPE_TX25 -#ifdef CONFIG_NAND_SPL +#ifdef CONFIG_SPL_BUILD /* Start copying real U-boot from the second page */ -#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x800 +#define CONFIG_SYS_NAND_U_BOOT_OFFS CONFIG_SPL_PAD_TO #define CONFIG_SYS_NAND_U_BOOT_SIZE 0x30000 -#define CONFIG_SYS_NAND_U_BOOT_DST (0x81200000) +#define CONFIG_SYS_NAND_U_BOOT_DST CONFIG_SYS_TEXT_BASE #define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_NAND_U_BOOT_DST #define CONFIG_SYS_NAND_PAGE_SIZE 2048 -#define CONFIG_SYS_NAND_SPARE_SIZE 64 +#define CONFIG_SYS_NAND_OOBSIZE 64 #define CONFIG_SYS_NAND_BLOCK_SIZE (128 * 1024) #define CONFIG_SYS_NAND_PAGE_COUNT 64 #define CONFIG_SYS_NAND_SIZE (128 * 1024 * 1024) @@ -173,7 +180,6 @@ /* additions for new relocation code, must be added to all boards */ #define CONFIG_SYS_SDRAM_BASE PHYS_SDRAM_1 -#define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_SDRAM_BASE + 0x1000 - /* Fix this */ \ - GENERATED_GBL_DATA_SIZE) +#define CONFIG_SYS_INIT_SP_ADDR (IMX_RAM_BASE + IMX_RAM_SIZE) #endif /* __CONFIG_H */ diff --git a/include/fsl_nfc.h b/include/fsl_nfc.h deleted file mode 100644 index 48a6448..0000000 --- a/include/fsl_nfc.h +++ /dev/null @@ -1,225 +0,0 @@ -/* - * (c) 2009 Magnus Lilja - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#ifndef __FSL_NFC_H -#define __FSL_NFC_H - -/* - * Register map and bit definitions for the Freescale NAND Flash Controller - * present in various i.MX devices. - * - * MX31 and MX27 have version 1, which has: - * 4 512-byte main buffers and - * 4 16-byte spare buffers - * to support up to 2K byte pagesize nand. - * Reading or writing a 2K page requires 4 FDI/FDO cycles. - * - * MX25 and MX35 have version 2.1, and MX51 and MX53 have version 3.2, which - * have: - * 8 512-byte main buffers and - * 8 64-byte spare buffers - * to support up to 4K byte pagesize nand. - * Reading or writing a 2K or 4K page requires only 1 FDI/FDO cycle. - * Also some of registers are moved and/or changed meaning as seen below. - */ -#if defined(CONFIG_MX27) || defined(CONFIG_MX31) -#define MXC_NFC_V1 -#define is_mxc_nfc_1() 1 -#define is_mxc_nfc_21() 0 -#define is_mxc_nfc_32() 0 -#elif defined(CONFIG_MX25) || defined(CONFIG_MX35) -#define MXC_NFC_V2_1 -#define is_mxc_nfc_1() 0 -#define is_mxc_nfc_21() 1 -#define is_mxc_nfc_32() 0 -#elif defined(CONFIG_MX51) || defined(CONFIG_MX53) -#define MXC_NFC_V3 -#define MXC_NFC_V3_2 -#define is_mxc_nfc_1() 0 -#define is_mxc_nfc_21() 0 -#define is_mxc_nfc_32() 1 -#else -#error "MXC NFC implementation not supported" -#endif -#define is_mxc_nfc_3() is_mxc_nfc_32() - -#if defined(MXC_NFC_V1) -#define NAND_MXC_NR_BUFS 4 -#define NAND_MXC_SPARE_BUF_SIZE 16 -#define NAND_MXC_REG_OFFSET 0xe00 -#define NAND_MXC_2K_MULTI_CYCLE -#elif defined(MXC_NFC_V2_1) || defined(MXC_NFC_V3_2) -#define NAND_MXC_NR_BUFS 8 -#define NAND_MXC_SPARE_BUF_SIZE 64 -#define NAND_MXC_REG_OFFSET 0x1e00 -#endif - -struct fsl_nfc_regs { - u8 main_area[NAND_MXC_NR_BUFS][0x200]; - u8 spare_area[NAND_MXC_NR_BUFS][NAND_MXC_SPARE_BUF_SIZE]; - /* - * reserved size is offset of nfc registers - * minus total main and spare sizes - */ - u8 reserved1[NAND_MXC_REG_OFFSET - - NAND_MXC_NR_BUFS * (512 + NAND_MXC_SPARE_BUF_SIZE)]; -#if defined(MXC_NFC_V1) - u16 buf_size; - u16 reserved2; - u16 buf_addr; - u16 flash_addr; - u16 flash_cmd; - u16 config; - u16 ecc_status_result; - u16 rsltmain_area; - u16 rsltspare_area; - u16 wrprot; - u16 unlockstart_blkaddr; - u16 unlockend_blkaddr; - u16 nf_wrprst; - u16 config1; - u16 config2; -#elif defined(MXC_NFC_V2_1) - u16 reserved2[2]; - u16 buf_addr; - u16 flash_addr; - u16 flash_cmd; - u16 config; - u32 ecc_status_result; - u16 spare_area_size; - u16 wrprot; - u16 reserved3[2]; - u16 nf_wrprst; - u16 config1; - u16 config2; - u16 reserved4; - u16 unlockstart_blkaddr; - u16 unlockend_blkaddr; - u16 unlockstart_blkaddr1; - u16 unlockend_blkaddr1; - u16 unlockstart_blkaddr2; - u16 unlockend_blkaddr2; - u16 unlockstart_blkaddr3; - u16 unlockend_blkaddr3; -#elif defined(MXC_NFC_V3_2) - u32 flash_cmd; - u32 flash_addr[12]; - u32 config1; - u32 ecc_status_result; - u32 status_sum; - u32 launch; -#endif -}; - -#ifdef MXC_NFC_V3_2 -struct fsl_nfc_ip_regs { - u32 wrprot; - u32 wrprot_unlock_blkaddr[8]; - u32 config2; - u32 config3; - u32 ipc; - u32 err_addr; - u32 delay_line; -}; -#endif - -/* Set FCMD to 1, rest to 0 for Command operation */ -#define NFC_CMD 0x1 - -/* Set FADD to 1, rest to 0 for Address operation */ -#define NFC_ADDR 0x2 - -/* Set FDI to 1, rest to 0 for Input operation */ -#define NFC_INPUT 0x4 - -/* Set FDO to 001, rest to 0 for Data Output operation */ -#define NFC_OUTPUT 0x8 - -/* Set FDO to 010, rest to 0 for Read ID operation */ -#define NFC_ID 0x10 - -/* Set FDO to 100, rest to 0 for Read Status operation */ -#define NFC_STATUS 0x20 - -#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) -#define NFC_CONFIG1_SP_EN (1 << 2) -#define NFC_CONFIG1_RST (1 << 6) -#define NFC_CONFIG1_CE (1 << 7) -#elif defined(MXC_NFC_V3_2) -#define NFC_CONFIG1_SP_EN (1 << 0) -#define NFC_CONFIG1_CE (1 << 1) -#define NFC_CONFIG1_RST (1 << 2) -#endif -#define NFC_V1_V2_CONFIG1_ECC_EN (1 << 3) -#define NFC_V1_V2_CONFIG1_INT_MSK (1 << 4) -#define NFC_V1_V2_CONFIG1_BIG (1 << 5) -#define NFC_V2_CONFIG1_ECC_MODE_4 (1 << 0) -#define NFC_V2_CONFIG1_ONE_CYCLE (1 << 8) -#define NFC_V2_CONFIG1_FP_INT (1 << 11) -#define NFC_V3_CONFIG1_RBA_MASK (0x7 << 4) -#define NFC_V3_CONFIG1_RBA(x) (((x) & 0x7) << 4) - -#define NFC_V1_V2_CONFIG2_INT (1 << 15) -#define NFC_V3_CONFIG2_PS_MASK (0x3 << 0) -#define NFC_V3_CONFIG2_PS_512 (0 << 0) -#define NFC_V3_CONFIG2_PS_2048 (1 << 0) -#define NFC_V3_CONFIG2_PS_4096 (2 << 0) -#define NFC_V3_CONFIG2_ONE_CYCLE (1 << 2) -#define NFC_V3_CONFIG2_ECC_EN (1 << 3) -#define NFC_V3_CONFIG2_2CMD_PHASES (1 << 4) -#define NFC_V3_CONFIG2_NUM_ADDR_PH0 (1 << 5) -#define NFC_V3_CONFIG2_ECC_MODE_8 (1 << 6) -#define NFC_V3_CONFIG2_PPB_MASK (0x3 << 7) -#define NFC_V3_CONFIG2_PPB(x) (((x) & 0x3) << 7) -#define NFC_V3_CONFIG2_EDC_MASK (0x7 << 9) -#define NFC_V3_CONFIG2_EDC(x) (((x) & 0x7) << 9) -#define NFC_V3_CONFIG2_NUM_ADDR_PH1(x) (((x) & 0x3) << 12) -#define NFC_V3_CONFIG2_INT_MSK (1 << 15) -#define NFC_V3_CONFIG2_SPAS_MASK (0xff << 16) -#define NFC_V3_CONFIG2_SPAS(x) (((x) & 0xff) << 16) -#define NFC_V3_CONFIG2_ST_CMD_MASK (0xff << 24) -#define NFC_V3_CONFIG2_ST_CMD(x) (((x) & 0xff) << 24) - -#define NFC_V3_CONFIG3_ADD_OP(x) (((x) & 0x3) << 0) -#define NFC_V3_CONFIG3_FW8 (1 << 3) -#define NFC_V3_CONFIG3_SBB(x) (((x) & 0x7) << 8) -#define NFC_V3_CONFIG3_NUM_OF_DEVS(x) (((x) & 0x7) << 12) -#define NFC_V3_CONFIG3_RBB_MODE (1 << 15) -#define NFC_V3_CONFIG3_NO_SDMA (1 << 20) - -#define NFC_V3_WRPROT_UNLOCK (1 << 2) -#define NFC_V3_WRPROT_BLS_UNLOCK (2 << 6) - -#define NFC_V3_IPC_CREQ (1 << 0) -#define NFC_V3_IPC_INT (1 << 31) - -#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) -#define operation config2 -#define readnfc readw -#define writenfc writew -#elif defined(MXC_NFC_V3_2) -#define operation launch -#define readnfc readl -#define writenfc writel -#endif - -#endif /* __FSL_NFC_H */ diff --git a/nand_spl/board/freescale/mx31pdk/Makefile b/nand_spl/board/freescale/mx31pdk/Makefile deleted file mode 100644 index 3d57059..0000000 --- a/nand_spl/board/freescale/mx31pdk/Makefile +++ /dev/null @@ -1,63 +0,0 @@ -CONFIG_NAND_SPL = y -PAD_TO := 2048 - -include $(TOPDIR)/config.mk - -nandobj := $(OBJTREE)/nand_spl/ - -LDSCRIPT= $(TOPDIR)/nand_spl/board/$(BOARDDIR)/u-boot.lds -LDFLAGS := -T $(nandobj)u-boot.lds -Ttext $(CONFIG_SYS_TEXT_BASE) $(LDFLAGS) \ - $(LDFLAGS_FINAL) -AFLAGS += -DCONFIG_SPL_BUILD -DCONFIG_NAND_SPL -CFLAGS += -DCONFIG_SPL_BUILD -DCONFIG_NAND_SPL - -SOBJS = start.o crt0.o lowlevel_init.o -COBJS = nand_boot_fsl_nfc.o - -SRCS := $(SRCTREE)/nand_spl/nand_boot_fsl_nfc.c -SRCS += $(SRCTREE)/arch/arm/cpu/arm1136/start.S -SRCS += $(SRCTREE)/arch/arm/lib/crt0.S -SRCS += $(SRCTREE)/board/freescale/mx31pdk/lowlevel_init.S -OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) -__OBJS := $(SOBJS) $(COBJS) -LNDIR := $(nandobj)board/$(BOARDDIR) - -ALL = $(nandobj)u-boot-spl $(nandobj)u-boot-spl.bin $(nandobj)u-boot-spl-16k.bin - -all: $(obj).depend $(ALL) - -$(nandobj)u-boot-spl-16k.bin: $(nandobj)u-boot-spl - $(OBJCOPY) ${OBJCFLAGS} --pad-to=$(PAD_TO) -O binary $< $@ - -$(nandobj)u-boot-spl.bin: $(nandobj)u-boot-spl - $(OBJCOPY) ${OBJCFLAGS} -O binary $< $@ - -$(nandobj)u-boot-spl: $(OBJS) $(nandobj)u-boot.lds - cd $(LNDIR) && $(LD) $(LDFLAGS) $(__OBJS) \ - -Map $(nandobj)u-boot-spl.map \ - -o $@ - -$(nandobj)u-boot.lds: $(LDSCRIPT) - $(CPP) $(CPPFLAGS) $(LDPPFLAGS) -I$(nandobj)/board/$(BOARDDIR) \ - -ansi -D__ASSEMBLY__ -P - <$< >$@ - -######################################################################### - -$(obj)%.o: $(SRCTREE)/arch/arm/cpu/arm1136/%.S - $(CC) $(AFLAGS) -c -o $@ $< - -$(obj)%.o: $(SRCTREE)/arch/arm/lib/%.S - $(CC) $(AFLAGS) -c -o $@ $< - -$(obj)%.o: $(SRCTREE)/board/freescale/mx31pdk/%.S - $(CC) $(AFLAGS) -c -o $@ $< - -$(obj)%.o: $(SRCTREE)/nand_spl/%.c - $(CC) $(CFLAGS) -c -o $@ $< - -# defines $(obj).depend target -include $(SRCTREE)/rules.mk - -sinclude $(obj).depend - -######################################################################### diff --git a/nand_spl/board/freescale/mx31pdk/u-boot.lds b/nand_spl/board/freescale/mx31pdk/u-boot.lds deleted file mode 100644 index 5f2b5e2..0000000 --- a/nand_spl/board/freescale/mx31pdk/u-boot.lds +++ /dev/null @@ -1,87 +0,0 @@ -/* - * (C) Copyright 2009 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ -OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") -OUTPUT_ARCH(arm) -ENTRY(_start) -SECTIONS -{ - . = 0x00000000; - - . = ALIGN(4); - .text : - { - start.o (.text) - lowlevel_init.o (.text) - nand_boot_fsl_nfc.o (.text) - *(.text) - . = 2K; - } - - . = ALIGN(4); - .rodata : { *(.rodata) } - - . = ALIGN(4); - .data : { - *(.data) - } - - . = ALIGN(4); - - . = ALIGN(4); - .u_boot_list : { - *(SORT(.u_boot_list*)); - } - - . = ALIGN(4); - - __image_copy_end = .; - - .rel.dyn : { - __rel_dyn_start = .; - *(.rel*) - __rel_dyn_end = .; - } - - .dynsym : { - __dynsym_start = .; - *(.dynsym) - } - - _end = .; - - .bss __rel_dyn_start (OVERLAY) : { - __bss_start = .; - *(.bss) - . = ALIGN(4); - __bss_end = .; - } - - /DISCARD/ : { *(.bss*) } - /DISCARD/ : { *(.dynstr*) } - /DISCARD/ : { *(.dynsym*) } - /DISCARD/ : { *(.dynamic*) } - /DISCARD/ : { *(.hash*) } - /DISCARD/ : { *(.plt*) } - /DISCARD/ : { *(.interp*) } - /DISCARD/ : { *(.gnu*) } -} diff --git a/nand_spl/board/karo/tx25/Makefile b/nand_spl/board/karo/tx25/Makefile deleted file mode 100644 index 9f9c589..0000000 --- a/nand_spl/board/karo/tx25/Makefile +++ /dev/null @@ -1,84 +0,0 @@ -# -# (C) Copyright 2009 DENX Software Engineering -# -# See file CREDITS for list of people who contributed to this -# project. -# -# This program is free software; you can redistribute it and/or -# modify it under the terms of the GNU General Public License as -# published by the Free Software Foundatio; either version 2 of -# the License, or (at your option) any later version. -# -# This program is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place, Suite 330, Boston, -# MA 02111-1307 USA -# -CONFIG_NAND_SPL = y - -include $(TOPDIR)/config.mk -include $(TOPDIR)/nand_spl/board/$(BOARDDIR)/config.mk - -nandobj := $(OBJTREE)/nand_spl/ - -LDSCRIPT= $(TOPDIR)/nand_spl/board/$(BOARDDIR)/u-boot.lds -LDFLAGS := -T $(nandobj)u-boot.lds -Ttext $(CONFIG_SYS_TEXT_BASE) $(LDFLAGS) \ - $(LDFLAGS_FINAL) -AFLAGS += -DCONFIG_SPL_BUILD -DCONFIG_NAND_SPL -CFLAGS += -DCONFIG_SPL_BUILD -DCONFIG_NAND_SPL - -SOBJS = start.o crt0.o lowlevel_init.o -COBJS = nand_boot_fsl_nfc.o - -SRCS := $(SRCTREE)/nand_spl/nand_boot_fsl_nfc.c -SRCS += $(SRCTREE)/arch/arm/cpu/arm926ejs/start.S -SRCS += $(SRCTREE)/arch/arm/lib/crt0.S -SRCS += $(SRCTREE)/board/karo/tx25/lowlevel_init.S -OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS)) -__OBJS := $(SOBJS) $(COBJS) -LNDIR := $(nandobj)board/$(BOARDDIR) - -ALL = $(nandobj)u-boot-spl $(nandobj)u-boot-spl.bin $(nandobj)u-boot-spl-16k.bin - -all: $(obj).depend $(ALL) - -$(nandobj)u-boot-spl-16k.bin: $(nandobj)u-boot-spl - $(OBJCOPY) ${OBJCFLAGS} --pad-to=$(PAD_TO) -O binary $< $@ - -$(nandobj)u-boot-spl.bin: $(nandobj)u-boot-spl - $(OBJCOPY) ${OBJCFLAGS} -O binary $< $@ - -$(nandobj)u-boot-spl: $(OBJS) $(nandobj)u-boot.lds - cd $(LNDIR) && $(LD) $(LDFLAGS) $(__OBJS) \ - -Map $(nandobj)u-boot-spl.map \ - -o $@ - -$(nandobj)u-boot.lds: $(LDSCRIPT) - $(CPP) $(CPPFLAGS) $(LDPPFLAGS) -I$(nandobj)/board/$(BOARDDIR) \ - -ansi -D__ASSEMBLY__ -P - <$< >$@ - -######################################################################### - -$(obj)%.o: $(SRCTREE)/arch/arm/cpu/arm926ejs/%.S - $(CC) $(AFLAGS) -c -o $@ $< - -$(obj)%.o: $(SRCTREE)/arch/arm/lib/%.S - $(CC) $(AFLAGS) -c -o $@ $< - -$(obj)%.o: $(SRCTREE)/board/karo/tx25/%.S - $(CC) $(AFLAGS) -c -o $@ $< - -$(obj)%.o: $(SRCTREE)/nand_spl/%.c - $(CC) $(CFLAGS) -c -o $@ $< - -# defines $(obj).depend target -include $(SRCTREE)/rules.mk - -sinclude $(obj).depend - -######################################################################### diff --git a/nand_spl/board/karo/tx25/config.mk b/nand_spl/board/karo/tx25/config.mk deleted file mode 100644 index 68afbf1..0000000 --- a/nand_spl/board/karo/tx25/config.mk +++ /dev/null @@ -1 +0,0 @@ -PAD_TO := 2048 diff --git a/nand_spl/board/karo/tx25/u-boot.lds b/nand_spl/board/karo/tx25/u-boot.lds deleted file mode 100644 index e5363e2..0000000 --- a/nand_spl/board/karo/tx25/u-boot.lds +++ /dev/null @@ -1,87 +0,0 @@ -/* - * (C) Copyright 2009 - * Wolfgang Denk, DENX Software Engineering, wd@denx.de. - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ -OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm") -OUTPUT_ARCH(arm) -ENTRY(_start) -SECTIONS -{ - . = 0x00000000; - - . = ALIGN(4); - .text : - { - start.o (.text) - lowlevel_init.o (.text) - nand_boot_fsl_nfc.o (.text) - *(.text) - . = 2K; - } - - . = ALIGN(4); - .rodata : { *(.rodata) } - - . = ALIGN(4); - .data : { - *(.data) - } - - . = ALIGN(4); - - . = ALIGN(4); - .u_boot_list : { - *(SORT(.u_boot_list*)); - } - - . = ALIGN(4); - - __image_copy_end = .; - - .rel.dyn : { - __rel_dyn_start = .; - *(.rel*) - __rel_dyn_end = .; - } - - .dynsym : { - __dynsym_start = .; - *(.dynsym) - } - - _end = .; - - .bss __rel_dyn_start (OVERLAY) : { - __bss_start = .; - *(.bss) - . = ALIGN(4); - __bss_end = .; - } - - /DISCARD/ : { *(.bss*) } - /DISCARD/ : { *(.dynstr*) } - /DISCARD/ : { *(.dynsym*) } - /DISCARD/ : { *(.dynamic*) } - /DISCARD/ : { *(.hash*) } - /DISCARD/ : { *(.plt*) } - /DISCARD/ : { *(.interp*) } - /DISCARD/ : { *(.gnu*) } -} diff --git a/nand_spl/nand_boot_fsl_nfc.c b/nand_spl/nand_boot_fsl_nfc.c deleted file mode 100644 index 1096727..0000000 --- a/nand_spl/nand_boot_fsl_nfc.c +++ /dev/null @@ -1,374 +0,0 @@ -/* - * (C) Copyright 2009 - * Magnus Lilja - * - * (C) Copyright 2008 - * Maxim Artamonov, - * - * (C) Copyright 2006-2008 - * Stefan Roese, DENX Software Engineering, sr at denx.de. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include -#include -#include -#include -#include - -#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) -static struct fsl_nfc_regs *const nfc = (void *)NFC_BASE_ADDR; -#elif defined(MXC_NFC_V3_2) -static struct fsl_nfc_regs *const nfc = (void *)NFC_BASE_ADDR_AXI; -static struct fsl_nfc_ip_regs *const nfc_ip = (void *)NFC_BASE_ADDR; -#endif - -static void nfc_wait_ready(void) -{ - uint32_t tmp; - -#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) - while (!(readnfc(&nfc->config2) & NFC_V1_V2_CONFIG2_INT)) - ; - - /* Reset interrupt flag */ - tmp = readnfc(&nfc->config2); - tmp &= ~NFC_V1_V2_CONFIG2_INT; - writenfc(tmp, &nfc->config2); -#elif defined(MXC_NFC_V3_2) - while (!(readnfc(&nfc_ip->ipc) & NFC_V3_IPC_INT)) - ; - - /* Reset interrupt flag */ - tmp = readnfc(&nfc_ip->ipc); - tmp &= ~NFC_V3_IPC_INT; - writenfc(tmp, &nfc_ip->ipc); -#endif -} - -static void nfc_nand_init(void) -{ -#if defined(MXC_NFC_V3_2) - int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512; - int tmp; - - tmp = (readnfc(&nfc_ip->config2) & ~(NFC_V3_CONFIG2_SPAS_MASK | - NFC_V3_CONFIG2_EDC_MASK | NFC_V3_CONFIG2_PS_MASK)) | - NFC_V3_CONFIG2_SPAS(CONFIG_SYS_NAND_SPARE_SIZE / 2) | - NFC_V3_CONFIG2_INT_MSK | NFC_V3_CONFIG2_ECC_EN | - NFC_V3_CONFIG2_ONE_CYCLE; - if (CONFIG_SYS_NAND_PAGE_SIZE == 4096) - tmp |= NFC_V3_CONFIG2_PS_4096; - else if (CONFIG_SYS_NAND_PAGE_SIZE == 2048) - tmp |= NFC_V3_CONFIG2_PS_2048; - else if (CONFIG_SYS_NAND_PAGE_SIZE == 512) - tmp |= NFC_V3_CONFIG2_PS_512; - /* - * if spare size is larger that 16 bytes per 512 byte hunk - * then use 8 symbol correction instead of 4 - */ - if (CONFIG_SYS_NAND_SPARE_SIZE / ecc_per_page > 16) - tmp |= NFC_V3_CONFIG2_ECC_MODE_8; - else - tmp &= ~NFC_V3_CONFIG2_ECC_MODE_8; - writenfc(tmp, &nfc_ip->config2); - - tmp = NFC_V3_CONFIG3_NUM_OF_DEVS(0) | - NFC_V3_CONFIG3_NO_SDMA | - NFC_V3_CONFIG3_RBB_MODE | - NFC_V3_CONFIG3_SBB(6) | /* Reset default */ - NFC_V3_CONFIG3_ADD_OP(0); -#ifndef CONFIG_SYS_NAND_BUSWIDTH_16 - tmp |= NFC_V3_CONFIG3_FW8; -#endif - writenfc(tmp, &nfc_ip->config3); - - writenfc(0, &nfc_ip->delay_line); -#elif defined(MXC_NFC_V2_1) - int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512; - int config1; - - writenfc(CONFIG_SYS_NAND_SPARE_SIZE / 2, &nfc->spare_area_size); - - /* unlocking RAM Buff */ - writenfc(0x2, &nfc->config); - - /* hardware ECC checking and correct */ - config1 = readnfc(&nfc->config1) | NFC_V1_V2_CONFIG1_ECC_EN | - NFC_V1_V2_CONFIG1_INT_MSK | NFC_V2_CONFIG1_ONE_CYCLE | - NFC_V2_CONFIG1_FP_INT; - /* - * if spare size is larger that 16 bytes per 512 byte hunk - * then use 8 symbol correction instead of 4 - */ - if (CONFIG_SYS_NAND_SPARE_SIZE / ecc_per_page > 16) - config1 &= ~NFC_V2_CONFIG1_ECC_MODE_4; - else - config1 |= NFC_V2_CONFIG1_ECC_MODE_4; - writenfc(config1, &nfc->config1); -#elif defined(MXC_NFC_V1) - /* unlocking RAM Buff */ - writenfc(0x2, &nfc->config); - - /* hardware ECC checking and correct */ - writenfc(NFC_V1_V2_CONFIG1_ECC_EN | NFC_V1_V2_CONFIG1_INT_MSK, - &nfc->config1); -#endif -} - -static void nfc_nand_command(unsigned short command) -{ - writenfc(command, &nfc->flash_cmd); - writenfc(NFC_CMD, &nfc->operation); - nfc_wait_ready(); -} - -static void nfc_nand_address(unsigned short address) -{ - writenfc(address, &nfc->flash_addr); - writenfc(NFC_ADDR, &nfc->operation); - nfc_wait_ready(); -} - -static void nfc_nand_page_address(unsigned int page_address) -{ - unsigned int page_count; - - nfc_nand_address(0x00); - - /* code only for large page flash */ - if (CONFIG_SYS_NAND_PAGE_SIZE > 512) - nfc_nand_address(0x00); - - page_count = CONFIG_SYS_NAND_SIZE / CONFIG_SYS_NAND_PAGE_SIZE; - - if (page_address <= page_count) { - page_count--; /* transform 0x01000000 to 0x00ffffff */ - do { - nfc_nand_address(page_address & 0xff); - page_address = page_address >> 8; - page_count = page_count >> 8; - } while (page_count); - } - - nfc_nand_address(0x00); -} - -static void nfc_nand_data_output(void) -{ -#ifdef NAND_MXC_2K_MULTI_CYCLE - int i; -#endif - -#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) - writenfc(0, &nfc->buf_addr); -#elif defined(MXC_NFC_V3_2) - int config1 = readnfc(&nfc->config1); - config1 &= ~NFC_V3_CONFIG1_RBA_MASK; - writenfc(config1, &nfc->config1); -#endif - writenfc(NFC_OUTPUT, &nfc->operation); - nfc_wait_ready(); -#ifdef NAND_MXC_2K_MULTI_CYCLE - /* - * This NAND controller requires multiple input commands - * for pages larger than 512 bytes. - */ - for (i = 1; i < CONFIG_SYS_NAND_PAGE_SIZE / 512; i++) { - writenfc(i, &nfc->buf_addr); - writenfc(NFC_OUTPUT, &nfc->operation); - nfc_wait_ready(); - } -#endif -} - -static int nfc_nand_check_ecc(void) -{ -#if defined(MXC_NFC_V1) - u16 ecc_status = readw(&nfc->ecc_status_result); - return (ecc_status & 0x3) == 2 || (ecc_status >> 2) == 2; -#elif defined(MXC_NFC_V2_1) || defined(MXC_NFC_V3_2) - u32 ecc_status = readl(&nfc->ecc_status_result); - int ecc_per_page = CONFIG_SYS_NAND_PAGE_SIZE / 512; - int err_limit = CONFIG_SYS_NAND_SPARE_SIZE / ecc_per_page > 16 ? 8 : 4; - int subpages = CONFIG_SYS_NAND_PAGE_SIZE / 512; - - do { - if ((ecc_status & 0xf) > err_limit) - return 1; - ecc_status >>= 4; - } while (--subpages); - - return 0; -#endif -} - -static void nfc_nand_read_page(unsigned int page_address) -{ - /* read in first 0 buffer */ -#if defined(MXC_NFC_V1) || defined(MXC_NFC_V2_1) - writenfc(0, &nfc->buf_addr); -#elif defined(MXC_NFC_V3_2) - int config1 = readnfc(&nfc->config1); - config1 &= ~NFC_V3_CONFIG1_RBA_MASK; - writenfc(config1, &nfc->config1); -#endif - nfc_nand_command(NAND_CMD_READ0); - nfc_nand_page_address(page_address); - - if (CONFIG_SYS_NAND_PAGE_SIZE > 512) - nfc_nand_command(NAND_CMD_READSTART); - - nfc_nand_data_output(); /* fill the main buffer 0 */ -} - -static int nfc_read_page(unsigned int page_address, unsigned char *buf) -{ - int i; - u32 *src; - u32 *dst; - - nfc_nand_read_page(page_address); - - if (nfc_nand_check_ecc()) - return -1; - - src = (u32 *)&nfc->main_area[0][0]; - dst = (u32 *)buf; - - /* main copy loop from NAND-buffer to SDRAM memory */ - for (i = 0; i < CONFIG_SYS_NAND_PAGE_SIZE / 4; i++) { - writel(readl(src), dst); - src++; - dst++; - } - - return 0; -} - -static int is_badblock(int pagenumber) -{ - int page = pagenumber; - u32 badblock; - u32 *src; - - /* Check the first two pages for bad block markers */ - for (page = pagenumber; page < pagenumber + 2; page++) { - nfc_nand_read_page(page); - - src = (u32 *)&nfc->spare_area[0][0]; - - /* - * IMPORTANT NOTE: The nand flash controller uses a non- - * standard layout for large page devices. This can - * affect the position of the bad block marker. - */ - /* Get the bad block marker */ - badblock = readl(&src[CONFIG_SYS_NAND_BAD_BLOCK_POS / 4]); - badblock >>= 8 * (CONFIG_SYS_NAND_BAD_BLOCK_POS % 4); - badblock &= 0xff; - - /* bad block marker verify */ - if (badblock != 0xff) - return 1; /* potential bad block */ - } - - return 0; -} - -static int nand_load(unsigned int from, unsigned int size, unsigned char *buf) -{ - int i; - unsigned int page; - unsigned int maxpages = CONFIG_SYS_NAND_SIZE / - CONFIG_SYS_NAND_PAGE_SIZE; - - nfc_nand_init(); - - /* Convert to page number */ - page = from / CONFIG_SYS_NAND_PAGE_SIZE; - i = 0; - - while (i < size / CONFIG_SYS_NAND_PAGE_SIZE) { - if (nfc_read_page(page, buf) < 0) - return -1; - - page++; - i++; - buf = buf + CONFIG_SYS_NAND_PAGE_SIZE; - - /* - * Check if we have crossed a block boundary, and if so - * check for bad block. - */ - if (!(page % CONFIG_SYS_NAND_PAGE_COUNT)) { - /* - * Yes, new block. See if this block is good. If not, - * loop until we find a good block. - */ - while (is_badblock(page)) { - page = page + CONFIG_SYS_NAND_PAGE_COUNT; - /* Check i we've reached the end of flash. */ - if (page >= maxpages) - return -1; - } - } - } - - return 0; -} - -#if defined(CONFIG_ARM) -void board_init_f (ulong bootflag) -{ - relocate_code (CONFIG_SYS_TEXT_BASE - TOTAL_MALLOC_LEN, NULL, - CONFIG_SYS_TEXT_BASE); -} -#endif - -/* - * The main entry for NAND booting. It's necessary that SDRAM is already - * configured and available since this code loads the main U-Boot image - * from NAND into SDRAM and starts it from there. - */ -void nand_boot(void) -{ - __attribute__((noreturn)) void (*uboot)(void); - - /* - * CONFIG_SYS_NAND_U_BOOT_OFFS and CONFIG_SYS_NAND_U_BOOT_SIZE must - * be aligned to full pages - */ - if (!nand_load(CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE, - (uchar *)CONFIG_SYS_NAND_U_BOOT_DST)) { - /* Copy from NAND successful, start U-boot */ - uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START; - uboot(); - } else { - /* Unrecoverable error when copying from NAND */ - hang(); - } -} - -/* - * Called in case of an exception. - */ -void hang(void) -{ - /* Loop forever */ - while (1) ; -} -- cgit v0.10.2