diff options
Diffstat (limited to 'arch/arm/cpu/arm1176/start.S')
| -rw-r--r-- | arch/arm/cpu/arm1176/start.S | 65 |
1 files changed, 47 insertions, 18 deletions
diff --git a/arch/arm/cpu/arm1176/start.S b/arch/arm/cpu/arm1176/start.S index e2b6c9b..a540edb 100644 --- a/arch/arm/cpu/arm1176/start.S +++ b/arch/arm/cpu/arm1176/start.S @@ -1,5 +1,5 @@ /* - * armboot - Startup Code for S3C6400/ARM1176 CPU-core + * armboot - Startup Code for ARM1176 CPU-core * * Copyright (c) 2007 Samsung Electronics * @@ -35,9 +35,6 @@ #ifdef CONFIG_ENABLE_MMU #include <asm/proc/domain.h> #endif -#ifdef CONFIG_S3C64XX -#include <asm/arch/s3c6400.h> -#endif #if !defined(CONFIG_ENABLE_MMU) && !defined(CONFIG_SYS_PHY_UBOOT_BASE) #define CONFIG_SYS_PHY_UBOOT_BASE CONFIG_SYS_UBOOT_BASE @@ -172,14 +169,10 @@ cpu_init_crit: bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM) orr r0, r0, #0x00000002 @ set bit 2 (A) Align orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache + /* Prepare to disable the MMU */ - adr r1, mmu_disable_phys - /* We presume we're within the first 1024 bytes */ - and r1, r1, #0x3fc - ldr r2, _TEXT_PHY_BASE - ldr r3, =0xfff00000 - and r2, r2, r3 - orr r2, r2, r1 + adr r2, mmu_disable_phys + sub r2, r2, #(CONFIG_SYS_PHY_UBOOT_BASE - TEXT_BASE) b mmu_disable .align 5 @@ -189,14 +182,30 @@ mmu_disable: nop nop mov pc, r2 +mmu_disable_phys: + +#ifdef CONFIG_DISABLE_TCM + /* + * Disable the TCMs + */ + mrc p15, 0, r0, c0, c0, 2 /* Return TCM details */ + cmp r0, #0 + beq skip_tcmdisable + mov r1, #0 + mov r2, #1 + tst r0, r2 + mcrne p15, 0, r1, c9, c1, 1 /* Disable Instruction TCM if present*/ + tst r0, r2, LSL #16 + mcrne p15, 0, r1, c9, c1, 0 /* Disable Data TCM if present*/ +skip_tcmdisable: +#endif #endif -mmu_disable_phys: -#ifdef CONFIG_S3C64XX +#ifdef CONFIG_PERIPORT_REMAP /* Peri port setup */ - ldr r0, =0x70000000 - orr r0, r0, #0x13 - mcr p15,0,r0,c15,c2,4 @ 256M (0x70000000 - 0x7fffffff) + ldr r0, =CONFIG_PERIPORT_BASE + orr r0, r0, #CONFIG_PERIPORT_SIZE + mcr p15,0,r0,c15,c2,4 #endif /* @@ -204,7 +213,25 @@ mmu_disable_phys: */ bl lowlevel_init /* go setup pll,mux,memory */ -after_copy: +#ifndef CONFIG_SKIP_RELOCATE_UBOOT +relocate: /* relocate U-Boot to RAM */ + adr r0, _start /* r0 <- current position of code */ + ldr r1, _TEXT_BASE /* test if we run from flash or RAM */ + cmp r0, r1 /* don't reloc during debug */ + beq stack_setup + + ldr r2, _armboot_start + ldr r3, _bss_start + sub r2, r3, r2 /* r2 <- size of armboot */ + add r2, r0, r2 /* r2 <- source end address */ + +copy_loop: + ldmia r0!, {r3-r10} /* copy from source address [r0] */ + stmia r1!, {r3-r10} /* copy to target address [r1] */ + cmp r0, r2 /* until source end addreee [r2] */ + ble copy_loop +#endif /* CONFIG_SKIP_RELOCATE_UBOOT */ + #ifdef CONFIG_ENABLE_MMU enable_mmu: /* enable domain access */ @@ -240,9 +267,9 @@ mmu_enable: nop nop mov pc, r2 +skip_hw_init: #endif -skip_hw_init: /* Set up the stack */ stack_setup: ldr r0, =CONFIG_SYS_UBOOT_BASE /* base of copy in DRAM */ @@ -310,6 +337,8 @@ phy_last_jump: mov r0, #0 mov pc, r9 #endif + + /* ************************************************************************* * |