diff options
Diffstat (limited to 'src/northbridge/via')
-rw-r--r-- | src/northbridge/via/vx800/examples/romstage.c | 101 |
1 files changed, 1 insertions, 100 deletions
diff --git a/src/northbridge/via/vx800/examples/romstage.c b/src/northbridge/via/vx800/examples/romstage.c index 77ee43830d..9fac9a3110 100644 --- a/src/northbridge/via/vx800/examples/romstage.c +++ b/src/northbridge/via/vx800/examples/romstage.c @@ -300,7 +300,7 @@ void EmbedComInit() /* cache_as_ram.inc jump to here */ -void stage1_main(unsigned long bist) +void main(unsigned long bist) { unsigned cpu_reset = 0; u16 boot_mode; @@ -556,103 +556,4 @@ g) Rx73h = 32h );*/ } #endif -/* -the following code is copied from src/mainboard/tyan/s2735/romstage.c -Only the code around CLEAR_FIRST_1M_RAM is changed. -I remove all the code around CLEAR_FIRST_1M_RAM and #include "cpu/x86/car/cache_as_ram_post.c" -the CLEAR_FIRST_1M_RAM seems to make cpu/x86/car/cache_as_ram_post.c stop at somewhere, -and cpu/x86/car/cache_as_ram_post.c do not cache my $CONFIG_XIP_ROM_BASE+SIZE area. - -So, I use: #include "cpu/via/car/cache_as_ram_post.c". my via-version post.c have some diff with x86-version -*/ -#if 1 - { - /* Check value of esp to verify if we have enough rom for stack in Cache as RAM */ - unsigned v_esp; - __asm__ volatile ("movl %%esp, %0\n\t":"=a" (v_esp) - ); -#if CONFIG_USE_PRINTK_IN_CAR - printk(BIOS_DEBUG, "v_esp=%08x\n", v_esp); -#else - print_debug("v_esp="); - print_debug_hex32(v_esp); - print_debug("\n"); -#endif - } - -#endif -#if 1 - - cpu_reset_x: -// it seems that cpu_reset is not used before this, so I just reset it, (this is because the s3 resume, setting in mtrr and copy data may destroy -//stack - cpu_reset = 0; -#if CONFIG_USE_PRINTK_IN_CAR - printk(BIOS_DEBUG, "cpu_reset = %08x\n", cpu_reset); -#else - print_debug("cpu_reset = "); - print_debug_hex32(cpu_reset); - print_debug("\n"); -#endif - - if (cpu_reset == 0) { - print_debug("Clearing initial memory region: "); - } - print_debug("No cache as ram now - "); - - /* store cpu_reset to ebx */ - __asm__ volatile ("movl %0, %%ebx\n\t"::"a" (cpu_reset) - ); - - -/* cancel these lines, CLEAR_FIRST_1M_RAM cause the cpu/x86/car/cache_as_ram_post.c stop at somewhere - - if(cpu_reset==0) { -#define CLEAR_FIRST_1M_RAM 1 -#include "cpu/via/car/cache_as_ram_post.c" - } - else { -#undef CLEAR_FIRST_1M_RAM -#include "cpu/via/car/cache_as_ram_post.c" - } -*/ -#include "cpu/via/car/cache_as_ram_post.c" -//#include "cpu/x86/car/cache_as_ram_post.c" - __asm__ volatile ( - /* set new esp *//* before CONFIG_RAMBASE */ - "subl %0, %%ebp\n\t" - "subl %0, %%esp\n\t":: - "a" ((CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE) - - CONFIG_RAMBASE) - ); - - { - unsigned new_cpu_reset; - - /* get back cpu_reset from ebx */ - __asm__ volatile ("movl %%ebx, %0\n\t":"=a" (new_cpu_reset) - ); - - /* We can not go back any more, we lost old stack data in cache as ram */ - if (new_cpu_reset == 0) { - print_debug("Use Ram as Stack now - done\n"); - } else { - print_debug("Use Ram as Stack now - \n"); - } -#if CONFIG_USE_PRINTK_IN_CAR - printk(BIOS_DEBUG, "new_cpu_reset = %08x\n", new_cpu_reset); -#else - print_debug("new_cpu_reset = "); - print_debug_hex32(new_cpu_reset); - print_debug("\n"); -#endif - /*copy and execute coreboot_ram */ - copy_and_run(new_cpu_reset); - /* We will not return */ - } -#endif - - - print_debug("should not be here -\n"); - } |