* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE
-#define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE
-
#include <cpu/x86/stack.h>
#include <cpu/x86/mtrr.h>
-#include <cpu/amd/mtrr.h>
+#include <cpu/x86/post_code.h>
+
+#define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE
+#define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE
- /* Save the BIST result */
- movl %eax, %ebp
+ /* Save the BIST result. */
+ movl %eax, %ebp
cache_as_ram:
post_code(0x20)
- /* Send INIT IPI to all excluding ourself */
- movl $0x000C4500, %eax
- movl $0xFEE00300, %esi
- movl %eax, (%esi)
+ /* Send INIT IPI to all excluding ourself. */
+ movl $0x000C4500, %eax
+ movl $0xFEE00300, %esi
+ movl %eax, (%esi)
- /* Zero out all Fixed Range and Variable Range MTRRs */
+ /* Zero out all fixed range and variable range MTRRs. */
movl $mtrr_table, %esi
- movl $( (mtrr_table_end - mtrr_table) / 2), %edi
- xorl %eax, %eax
- xorl %edx, %edx
+ movl $((mtrr_table_end - mtrr_table) / 2), %edi
+ xorl %eax, %eax
+ xorl %edx, %edx
clear_mtrrs:
- movw (%esi), %bx
- movzx %bx, %ecx
+ movw (%esi), %bx
+ movzx %bx, %ecx
wrmsr
add $2, %esi
dec %edi
jnz clear_mtrrs
- /* Configure the default memory type to uncacheable */
+ /* Configure the default memory type to uncacheable. */
movl $MTRRdefType_MSR, %ecx
rdmsr
andl $(~0x00000cff), %eax
wrmsr
- /* Set cache as ram base address */
+ /* Set Cache-as-RAM base address. */
movl $(MTRRphysBase_MSR(0)), %ecx
movl $(CACHE_AS_RAM_BASE | MTRR_TYPE_WRBACK), %eax
xorl %edx, %edx
wrmsr
- /* Set cache as ram mask */
+ /* Set Cache-as-RAM mask. */
movl $(MTRRphysMask_MSR(0)), %ecx
- movl $(~((CACHE_AS_RAM_SIZE-1)) | (1 << 11)), %eax
+ movl $(~(CACHE_AS_RAM_SIZE - 1) | MTRRphysMaskValid), %eax
movl $0x0000000f, %edx
wrmsr
- /* Enable MTRR */
+ /* Enable MTRR. */
movl $MTRRdefType_MSR, %ecx
rdmsr
- orl $(1 << 11), %eax
+ orl $MTRRdefTypeEn, %eax
wrmsr
- /* Enable L2 Cache */
+ /* Enable L2 cache. */
movl $0x11e, %ecx
rdmsr
orl $(1 << 8), %eax
wrmsr
- /* CR0.CD = 0, CR0.NW = 0 */
+ /* Enable cache (CR0.CD = 0, CR0.NW = 0). */
movl %cr0, %eax
- andl $( ~( (1 << 30) | (1 << 29) ) ), %eax
+ andl $(~((1 << 30) | (1 << 29))), %eax
invd
movl %eax, %cr0
- /* Clear the cache memory reagion */
+ /* Clear the cache memory reagion. */
movl $CACHE_AS_RAM_BASE, %esi
movl %esi, %edi
movl $(CACHE_AS_RAM_SIZE / 4), %ecx
- //movl $0x23322332, %eax
+ // movl $0x23322332, %eax
xorl %eax, %eax
rep stosl
- /* Enable Cache As RAM mode by disabling cache */
+ /* Enable Cache-as-RAM mode by disabling cache. */
movl %cr0, %eax
orl $(1 << 30), %eax
movl %eax, %cr0
-#if defined(CONFIG_XIP_ROM_SIZE) && defined(CONFIG_XIP_ROM_BASE)
+#if CONFIG_XIP_ROM_SIZE
/* Enable cache for our code in Flash because we do XIP here */
- movl $MTRRphysBase_MSR(1), %ecx
- xorl %edx, %edx
-#if defined(CONFIG_TINY_BOOTBLOCK) && CONFIG_TINY_BOOTBLOCK
-#define REAL_XIP_ROM_BASE AUTO_XIP_ROM_BASE
-#else
-#define REAL_XIP_ROM_BASE CONFIG_XIP_ROM_BASE
-#endif
- movl $REAL_XIP_ROM_BASE, %eax
- orl $MTRR_TYPE_WRBACK, %eax
- wrmsr
+ movl $MTRRphysBase_MSR(1), %ecx
+ xorl %edx, %edx
+ /*
+ * IMPORTANT: The following calculation _must_ be done at runtime. See
+ * http://www.coreboot.org/pipermail/coreboot/2010-October/060855.html
+ */
+ movl $copy_and_run, %eax
+ andl $(~(CONFIG_XIP_ROM_SIZE - 1)), %eax
+ orl $MTRR_TYPE_WRBACK, %eax
+ wrmsr
- movl $MTRRphysMask_MSR(1), %ecx
- movl $0x0000000f, %edx
- movl $(~(CONFIG_XIP_ROM_SIZE - 1) | 0x800), %eax
- wrmsr
-#endif /* CONFIG_XIP_ROM_SIZE && CONFIG_XIP_ROM_BASE */
+ movl $MTRRphysMask_MSR(1), %ecx
+ movl $0x0000000f, %edx
+ movl $(~(CONFIG_XIP_ROM_SIZE - 1) | MTRRphysMaskValid), %eax
+ wrmsr
+#endif /* CONFIG_XIP_ROM_SIZE */
- /* enable cache */
- movl %cr0, %eax
- andl $( ~( (1 << 30) | (1 << 29) ) ), %eax
+ /* Enable cache. */
+ movl %cr0, %eax
+ andl $(~((1 << 30) | (1 << 29))), %eax
movl %eax, %cr0
- /* Set up stack pointer */
-#if defined(CONFIG_USBDEBUG) && (CONFIG_USBDEBUG == 1)
- /* leave some space for the struct ehci_debug_info */
+ /* Set up the stack pointer. */
+#if CONFIG_USBDEBUG
+ /* Leave some space for the struct ehci_debug_info. */
movl $(CACHE_AS_RAM_BASE + CACHE_AS_RAM_SIZE - 4 - 128), %eax
#else
movl $(CACHE_AS_RAM_BASE + CACHE_AS_RAM_SIZE - 4), %eax
#endif
movl %eax, %esp
- /* Restore the BIST result */
+ /* Restore the BIST result. */
movl %ebp, %eax
movl %esp, %ebp
pushl %eax
post_code(0x23)
- /* Call romstage.c main function */
+ /* Call romstage.c main function. */
call main
post_code(0x2f)
post_code(0x30)
- /* Disable Cache */
+ /* Disable cache. */
movl %cr0, %eax
- orl $(1 << 30), %eax
+ orl $(1 << 30), %eax
movl %eax, %cr0
post_code(0x31)
- /* Disable MTRR */
+ /* Disable MTRR. */
movl $MTRRdefType_MSR, %ecx
rdmsr
- andl $(~(1 << 11)), %eax
+ andl $(~MTRRdefTypeEn), %eax
wrmsr
post_code(0x31)
post_code(0x33)
-#undef CLEAR_FIRST_1M_RAM
-#ifdef CLEAR_FIRST_1M_RAM
- post_code(0x34)
- /* Enable Write Combining and Speculative Reads for the first 1MB */
- movl $MTRRphysBase_MSR(0), %ecx
- movl $(0x00000000 | MTRR_TYPE_WRCOMB), %eax
- xorl %edx, %edx
- wrmsr
- movl $MTRRphysMask_MSR(0), %ecx
- movl $(~(1024*1024 -1) | (1 << 11)), %eax
- movl $0x0000000f, %edx // 36bit address space
- wrmsr
- post_code(0x35)
-#endif
-
- /* Enable Cache */
+ /* Enable cache. */
movl %cr0, %eax
- andl $~( (1 << 30) | (1 << 29) ), %eax
+ andl $~((1 << 30) | (1 << 29)), %eax
movl %eax, %cr0
-
post_code(0x36)
-#ifdef CLEAR_FIRST_1M_RAM
-
- /* Clear first 1MB of RAM */
- movl $0x00000000, %edi
- cld
- xorl %eax, %eax
- movl $((1024*1024) / 4), %ecx
- rep stosl
- post_code(0x37)
-#endif
-
- /* Disable Cache */
+ /* Disable cache. */
movl %cr0, %eax
- orl $(1 << 30), %eax
+ orl $(1 << 30), %eax
movl %eax, %cr0
post_code(0x38)
- /* Enable Write Back and Speculative Reads for the first 1MB */
+ /* Enable Write Back and Speculative Reads for the first 1MB. */
movl $MTRRphysBase_MSR(0), %ecx
movl $(0x00000000 | MTRR_TYPE_WRBACK), %eax
xorl %edx, %edx
wrmsr
movl $MTRRphysMask_MSR(0), %ecx
- movl $(~(1024*1024 -1) | (1 << 11)), %eax
+ movl $(~(CONFIG_RAMTOP - 1) | MTRRphysMaskValid), %eax
+ movl $0x0000000f, %edx // 36bit address space
+ wrmsr
+
+ /* Enable caching and Speculative Reads for the last 4MB. */
+ movl $MTRRphysBase_MSR(1), %ecx
+ movl $(0xffc00000 | MTRR_TYPE_WRPROT), %eax
+ xorl %edx, %edx
+ wrmsr
+ movl $MTRRphysMask_MSR(1), %ecx
+ movl $(~(4 * 1024 * 1024 - 1) | MTRRphysMaskValid), %eax
movl $0x0000000f, %edx // 36bit address space
wrmsr
post_code(0x39)
- /* And Enable Cache again after setting MTRRs */
+ /* And enable cache again after setting MTRRs. */
movl %cr0, %eax
- andl $~( (1 << 30) | (1 << 29) ), %eax
+ andl $~((1 << 30) | (1 << 29)), %eax
movl %eax, %cr0
post_code(0x3a)
- /* Enable MTRR */
+ /* Enable MTRR. */
movl $MTRRdefType_MSR, %ecx
rdmsr
- orl $(1 << 11), %eax
+ orl $MTRRdefTypeEn, %eax
wrmsr
post_code(0x3b)
- /* Invalidate the cache again */
+ /* Invalidate the cache again. */
invd
post_code(0x3c)
- /* clear boot_complete flag */
+ /* Clear boot_complete flag. */
xorl %ebp, %ebp
__main:
- post_code(0x11)
- cld /* clear direction flag */
+ post_code(POST_PREPARE_RAMSTAGE)
+ cld /* Clear direction flag. */
movl %ebp, %esi
- movl $ROMSTAGE_STACK, %esp
+ movl $ROMSTAGE_STACK, %esp
movl %esp, %ebp
- pushl %esi
- call copy_and_run
+ pushl %esi
+ call copy_and_run
.Lhlt:
- post_code(0xee)
+ post_code(POST_DEAD_CODE)
hlt
jmp .Lhlt
mtrr_table:
/* Fixed MTRRs */
- .word 0x250, 0x258, 0x259
- .word 0x268, 0x269, 0x26A
- .word 0x26B, 0x26C, 0x26D
- .word 0x26E, 0x26F
+ .word 0x250, 0x258, 0x259
+ .word 0x268, 0x269, 0x26A
+ .word 0x26B, 0x26C, 0x26D
+ .word 0x26E, 0x26F
/* Variable MTRRs */
- .word 0x200, 0x201, 0x202, 0x203
- .word 0x204, 0x205, 0x206, 0x207
- .word 0x208, 0x209, 0x20A, 0x20B
- .word 0x20C, 0x20D, 0x20E, 0x20F
+ .word 0x200, 0x201, 0x202, 0x203
+ .word 0x204, 0x205, 0x206, 0x207
+ .word 0x208, 0x209, 0x20A, 0x20B
+ .word 0x20C, 0x20D, 0x20E, 0x20F
mtrr_table_end:
projects / coreboot.git / blobdiff