diff options
Diffstat (limited to 'arch/arm/cpu/armv8')
| -rw-r--r-- | arch/arm/cpu/armv8/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/armv8/cpu.c | 14 | ||||
| -rw-r--r-- | arch/arm/cpu/armv8/lowlevel_init.S | 44 | ||||
| -rw-r--r-- | arch/arm/cpu/armv8/start.S | 7 | ||||
| -rw-r--r-- | arch/arm/cpu/armv8/zynqmp/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/cpu/armv8/zynqmp/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/cpu/armv8/zynqmp/handoff.c | 87 | ||||
| -rw-r--r-- | arch/arm/cpu/armv8/zynqmp/spl.c | 2 |
8 files changed, 153 insertions, 5 deletions
diff --git a/arch/arm/cpu/armv8/Makefile b/arch/arm/cpu/armv8/Makefile index 1f1de4a..65915ee 100644 --- a/arch/arm/cpu/armv8/Makefile +++ b/arch/arm/cpu/armv8/Makefile @@ -26,3 +26,4 @@ obj-$(CONFIG_S32V234) += s32v234/ obj-$(CONFIG_ARCH_ZYNQMP) += zynqmp/ obj-$(CONFIG_TARGET_HIKEY) += hisilicon/ obj-$(CONFIG_ARMV8_PSCI) += psci.o +obj-$(CONFIG_ARCH_SUNXI) += lowlevel_init.o diff --git a/arch/arm/cpu/armv8/cpu.c b/arch/arm/cpu/armv8/cpu.c index 5dcb5e2..28a27f7 100644 --- a/arch/arm/cpu/armv8/cpu.c +++ b/arch/arm/cpu/armv8/cpu.c @@ -17,6 +17,20 @@ #include <asm/secure.h> #include <linux/compiler.h> +/* + * sdelay() - simple spin loop. + * + * Will delay execution by roughly (@loops * 2) cycles. + * This is necessary to be used before timers are accessible. + * + * A value of "0" will results in 2^64 loops. + */ +void sdelay(unsigned long loops) +{ + __asm__ volatile ("1:\n" "subs %0, %0, #1\n" + "b.ne 1b" : "=r" (loops) : "0"(loops) : "cc"); +} + int cleanup_before_linux(void) { /* diff --git a/arch/arm/cpu/armv8/lowlevel_init.S b/arch/arm/cpu/armv8/lowlevel_init.S new file mode 100644 index 0000000..189e35f --- /dev/null +++ b/arch/arm/cpu/armv8/lowlevel_init.S @@ -0,0 +1,44 @@ +/* + * A lowlevel_init function that sets up the stack to call a C function to + * perform further init. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <asm-offsets.h> +#include <config.h> +#include <linux/linkage.h> + +ENTRY(lowlevel_init) + /* + * Setup a temporary stack. Global data is not available yet. + */ +#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_STACK) + ldr w0, =CONFIG_SPL_STACK +#else + ldr w0, =CONFIG_SYS_INIT_SP_ADDR +#endif + bic sp, x0, #0xf /* 16-byte alignment for ABI compliance */ + + /* + * Save the old LR(passed in x29) and the current LR to stack + */ + stp x29, x30, [sp, #-16]! + + /* + * Call the very early init function. This should do only the + * absolute bare minimum to get started. It should not: + * + * - set up DRAM + * - use global_data + * - clear BSS + * - try to start a console + * + * For boards with SPL this should be empty since SPL can do all of + * this init in the SPL board_init_f() function which is called + * immediately after this. + */ + bl s_init + ldp x29, x30, [sp] + ret +ENDPROC(lowlevel_init) diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index 368e3dc..62d97f7 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -19,8 +19,6 @@ .globl _start _start: - b reset - #ifdef CONFIG_ENABLE_ARM_SOC_BOOT0_HOOK /* * Various SoCs need something special and SoC-specific up front in @@ -28,7 +26,8 @@ _start: * use it here. */ #include <asm/arch/boot0.h> -ARM_SOC_BOOT0_HOOK +#else + b reset #endif .align 3 @@ -110,7 +109,7 @@ save_boot_params_ret: /* Processor specific initialization */ bl lowlevel_init -#if CONFIG_IS_ENABLED(ARMV8_SPIN_TABLE) +#if defined(CONFIG_ARMV8_SPIN_TABLE) && !defined(CONFIG_SPL_BUILD) branch_if_master x0, x1, master_cpu b spin_table_secondary_jump /* never return */ diff --git a/arch/arm/cpu/armv8/zynqmp/Kconfig b/arch/arm/cpu/armv8/zynqmp/Kconfig index e175e6e..499e1dd 100644 --- a/arch/arm/cpu/armv8/zynqmp/Kconfig +++ b/arch/arm/cpu/armv8/zynqmp/Kconfig @@ -28,6 +28,7 @@ config SYS_BOARD default "zynqmp" config SYS_VENDOR + string "Vendor name" default "xilinx" config SYS_SOC diff --git a/arch/arm/cpu/armv8/zynqmp/Makefile b/arch/arm/cpu/armv8/zynqmp/Makefile index be8673a..013f136 100644 --- a/arch/arm/cpu/armv8/zynqmp/Makefile +++ b/arch/arm/cpu/armv8/zynqmp/Makefile @@ -9,4 +9,4 @@ obj-y += clk.o obj-y += cpu.o obj-$(CONFIG_MP) += mp.o obj-y += slcr.o -obj-$(CONFIG_SPL_BUILD) += spl.o +obj-$(CONFIG_SPL_BUILD) += spl.o handoff.o diff --git a/arch/arm/cpu/armv8/zynqmp/handoff.c b/arch/arm/cpu/armv8/zynqmp/handoff.c new file mode 100644 index 0000000..25d6ef3 --- /dev/null +++ b/arch/arm/cpu/armv8/zynqmp/handoff.c @@ -0,0 +1,87 @@ +/* + * Copyright 2016 - 2017 Xilinx, Inc. + * + * Michal Simek <michal.simek@xilinx.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/hardware.h> +#include <asm/arch/sys_proto.h> + +/* + * atfhandoffparams + * Parameter bitfield encoding + * ----------------------------------------------------------------------------- + * Exec State 0 0 -> Aarch64, 1-> Aarch32 + * endianness 1 0 -> LE, 1 -> BE + * secure (TZ) 2 0 -> Non secure, 1 -> secure + * EL 3:4 00 -> EL0, 01 -> EL1, 10 -> EL2, 11 -> EL3 + * CPU# 5:6 00 -> A53_0, 01 -> A53_1, 10 -> A53_2, 11 -> A53_3 + */ + +#define FSBL_FLAGS_ESTATE_SHIFT 0 +#define FSBL_FLAGS_ESTATE_MASK (1 << FSBL_FLAGS_ESTATE_SHIFT) +#define FSBL_FLAGS_ESTATE_A64 0 +#define FSBL_FLAGS_ESTATE_A32 1 + +#define FSBL_FLAGS_ENDIAN_SHIFT 1 +#define FSBL_FLAGS_ENDIAN_MASK (1 << FSBL_FLAGS_ENDIAN_SHIFT) +#define FSBL_FLAGS_ENDIAN_LE 0 +#define FSBL_FLAGS_ENDIAN_BE 1 + +#define FSBL_FLAGS_TZ_SHIFT 2 +#define FSBL_FLAGS_TZ_MASK (1 << FSBL_FLAGS_TZ_SHIFT) +#define FSBL_FLAGS_NON_SECURE 0 +#define FSBL_FLAGS_SECURE 1 + +#define FSBL_FLAGS_EL_SHIFT 3 +#define FSBL_FLAGS_EL_MASK (3 << FSBL_FLAGS_EL_SHIFT) +#define FSBL_FLAGS_EL0 0 +#define FSBL_FLAGS_EL1 1 +#define FSBL_FLAGS_EL2 2 +#define FSBL_FLAGS_EL3 3 + +#define FSBL_FLAGS_CPU_SHIFT 5 +#define FSBL_FLAGS_CPU_MASK (3 << FSBL_FLAGS_CPU_SHIFT) +#define FSBL_FLAGS_A53_0 0 +#define FSBL_FLAGS_A53_1 1 +#define FSBL_FLAGS_A53_2 2 +#define FSBL_FLAGS_A53_3 3 + +#define FSBL_MAX_PARTITIONS 8 + +/* Structure corresponding to each partition entry */ +struct xfsbl_partition { + uint64_t entry_point; + uint64_t flags; +}; + +/* Structure for handoff parameters to ARM Trusted Firmware (ATF) */ +struct xfsbl_atf_handoff_params { + uint8_t magic[4]; + uint32_t num_entries; + struct xfsbl_partition partition[FSBL_MAX_PARTITIONS]; +}; + +#ifdef CONFIG_SPL_OS_BOOT +void handoff_setup(void) +{ + struct xfsbl_atf_handoff_params *atfhandoffparams; + + atfhandoffparams = (void *)CONFIG_SPL_TEXT_BASE; + atfhandoffparams->magic[0] = 'X'; + atfhandoffparams->magic[1] = 'L'; + atfhandoffparams->magic[2] = 'N'; + atfhandoffparams->magic[3] = 'X'; + + atfhandoffparams->num_entries = 1; + atfhandoffparams->partition[0].entry_point = CONFIG_SYS_TEXT_BASE; + atfhandoffparams->partition[0].flags = FSBL_FLAGS_EL2 << + FSBL_FLAGS_EL_SHIFT; + + writel(CONFIG_SPL_TEXT_BASE, &pmu_base->gen_storage6); +} +#endif diff --git a/arch/arm/cpu/armv8/zynqmp/spl.c b/arch/arm/cpu/armv8/zynqmp/spl.c index f5f550f..0a5f430 100644 --- a/arch/arm/cpu/armv8/zynqmp/spl.c +++ b/arch/arm/cpu/armv8/zynqmp/spl.c @@ -128,6 +128,8 @@ __weak void psu_init(void) #ifdef CONFIG_SPL_OS_BOOT int spl_start_uboot(void) { + handoff_setup(); + return 0; } #endif |