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Diffstat (limited to 'board/mpl/pip405/init.S')
| -rw-r--r-- | board/mpl/pip405/init.S | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/board/mpl/pip405/init.S b/board/mpl/pip405/init.S deleted file mode 100644 index 292393e..0000000 --- a/board/mpl/pip405/init.S +++ /dev/null @@ -1,197 +0,0 @@ -/* - * SPDX-License-Identifier: GPL-2.0 IBM-pibs - */ -/*----------------------------------------------------------------------------- - * Function: ext_bus_cntlr_init - * Description: Initializes the External Bus Controller for the external - * peripherals. IMPORTANT: For pass1 this code must run from - * cache since you can not reliably change a peripheral banks - * timing register (pbxap) while running code from that bank. - * For ex., since we are running from ROM on bank 0, we can NOT - * execute the code that modifies bank 0 timings from ROM, so - * we run it from cache. - * Bank 0 - Flash or Multi Purpose Socket - * Bank 1 - Multi Purpose Socket or Flash - * Bank 2 - not used - * Bank 3 - not used - * Bank 4 - not used - * Bank 5 - not used - * Bank 6 - used to switch on the 12V for the Multipurpose socket - * Bank 7 - Config Register - *-----------------------------------------------------------------------------*/ - -#include <configs/PIP405.h> -#include <ppc_asm.tmpl> -#include <ppc_defs.h> - -#include <asm/cache.h> -#include <asm/mmu.h> -#include <asm/ppc4xx.h> -#include "pip405.h" - - .globl ext_bus_cntlr_init - ext_bus_cntlr_init: - mflr r4 /* save link register */ - mfdcr r3,CPC0_PSR /* get strapping reg */ - andi. r0, r3, PSR_ROM_LOC /* mask out irrelevant bits */ - bnelr /* jump back if PCI boot */ - - bl ..getAddr -..getAddr: - mflr r3 /* get address of ..getAddr */ - mtlr r4 /* restore link register */ - addi r4,0,14 /* set ctr to 14; used to prefetch */ - mtctr r4 /* 14 cache lines to fit this function */ - /* in cache (gives us 8x14=112 instrctns) */ -..ebcloop: - icbt r0,r3 /* prefetch cache line for addr in r3 */ - addi r3,r3,32 /* move to next cache line */ - bdnz ..ebcloop /* continue for 14 cache lines */ - - /*------------------------------------------------------------------- - * Delay to ensure all accesses to ROM are complete before changing - * bank 0 timings. - *------------------------------------------------------------------- */ - addis r3,0,0x0 - ori r3,r3,0xA000 - mtctr r3 -..spinlp: - bdnz ..spinlp /* spin loop */ - - /*----------------------------------------------------------------------- - * decide boot up mode - *----------------------------------------------------------------------- */ - addi r4,0,PB0CR - mtdcr EBC0_CFGADDR,r4 - mfdcr r4,EBC0_CFGDATA - - andi. r0, r4, 0x2000 /* mask out irrelevant bits */ - beq 0f /* jump if 8 bit bus width */ - - /* setup 16 bit things - *----------------------------------------------------------------------- - * Memory Bank 0 (16 Bit Flash) initialization - *---------------------------------------------------------------------- */ - - addi r4,0,PB1AP - mtdcr EBC0_CFGADDR,r4 - addis r4,0,(FLASH_AP_B)@h - ori r4,r4,(FLASH_AP_B)@l - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB0CR - mtdcr EBC0_CFGADDR,r4 - /* BS=0x010(4MB),BU=0x3(R/W), */ - addis r4,0,(FLASH_CR_B)@h - ori r4,r4,(FLASH_CR_B)@l - mtdcr EBC0_CFGDATA,r4 - b 1f - -0: - /* 8Bit boot mode: */ - /*----------------------------------------------------------------------- - * Memory Bank 0 Multi Purpose Socket initialization - *----------------------------------------------------------------------- */ - /* 0x7F8FFE80 slowest boot */ - addi r4,0,PB1AP - mtdcr EBC0_CFGADDR,r4 - addis r4,0,(MPS_AP_B)@h - ori r4,r4,(MPS_AP_B)@l - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB0CR - mtdcr EBC0_CFGADDR,r4 - /* BS=0x010(4MB),BU=0x3(R/W), */ - addis r4,0,(MPS_CR_B)@h - ori r4,r4,(MPS_CR_B)@l - mtdcr EBC0_CFGDATA,r4 - - -1: - /*----------------------------------------------------------------------- - * Memory Bank 2-3-4-5-6 (not used) initialization - *-----------------------------------------------------------------------*/ - addi r4,0,PB1CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x0000 - ori r4,r4,0x0000 - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB2CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x0000 - ori r4,r4,0x0000 - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB3CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x0000 - ori r4,r4,0x0000 - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB4CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x0000 - ori r4,r4,0x0000 - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB5CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x0000 - ori r4,r4,0x0000 - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB6CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x0000 - ori r4,r4,0x0000 - mtdcr EBC0_CFGDATA,r4 - - addi r4,0,PB7CR - mtdcr EBC0_CFGADDR,r4 - addis r4,0,0x0000 - ori r4,r4,0x0000 - mtdcr EBC0_CFGDATA,r4 - nop /* pass2 DCR errata #8 */ - blr - -#if defined(CONFIG_BOOT_PCI) - .section .bootpg,"ax" - .globl _start_pci -/******************************************* - */ - -_start_pci: - /* first handle errata #68 / PCI_18 */ - iccci r0, r0 /* invalidate I-cache */ - lis r31, 0 - mticcr r31 /* ICCR = 0 (all uncachable) */ - isync - - mfccr0 r28 /* set CCR0[24] = 1 */ - ori r28, r28, 0x0080 - mtccr0 r28 - - /* setup PMM0MA (0xEF400004) and PMM0PCIHA (0xEF40000C) */ - lis r28, 0xEF40 - addi r28, r28, 0x0004 - stw r31, 0x0C(r28) /* clear PMM0PCIHA */ - lis r29, 0xFFF8 /* open 512 kByte */ - addi r29, r29, 0x0001/* and enable this region */ - stwbrx r29, r0, r28 /* write PMM0MA */ - - lis r28, 0xEEC0 /* address of PCIC0_CFGADDR */ - addi r29, r28, 4 /* add 4 to r29 -> PCIC0_CFGDATA */ - - lis r31, 0x8000 /* set en bit bus 0 */ - ori r31, r31, 0x304C/* device 6 func 0 reg 4C (XBCS register) */ - stwbrx r31, r0, r28 /* write it */ - - lwbrx r31, r0, r29 /* load XBCS register */ - oris r31, r31, 0x02C4/* clear BIOSCS WPE, set lower, extended and 1M extended BIOS enable */ - stwbrx r31, r0, r29 /* write back XBCS register */ - - nop - nop - b _start /* normal start */ -#endif |