diff options
Diffstat (limited to 'src/cpu')
| -rw-r--r-- | src/cpu/intel/car/non-evict/cache_as_ram.S | 78 |
1 files changed, 47 insertions, 31 deletions
diff --git a/src/cpu/intel/car/non-evict/cache_as_ram.S b/src/cpu/intel/car/non-evict/cache_as_ram.S index 240d2ec9e4..0768c323f1 100644 --- a/src/cpu/intel/car/non-evict/cache_as_ram.S +++ b/src/cpu/intel/car/non-evict/cache_as_ram.S @@ -3,6 +3,7 @@ * * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com> * Copyright (C) 2007-2008 coresystems GmbH + * Copyright (C) 2012 Kyösti Mälkki <kyosti.malkki@gmail.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -22,8 +23,6 @@ + CONFIG_DCACHE_RAM_MRC_VAR_SIZE) #define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE -#define CPU_PHYSMASK_HI (1 << (CONFIG_CPU_ADDR_BITS - 32) - 1) - #define NoEvictMod_MSR 0x2e0 .code32 @@ -54,18 +53,16 @@ wait_for_sipi: wrmsr post_code(0x22) - /* Zero out all fixed range MTRRs. */ - movl $mtrr_table, %esi - movl $((mtrr_table_end - mtrr_table) >> 1), %edi - xorl %eax, %eax - xorl %edx, %edx -clear_mtrrs: - movw (%esi), %bx - movzx %bx, %ecx + /* Clear/disable fixed MTRRs */ + mov $fixed_mtrr_list_size, %ebx + xor %eax, %eax + xor %edx, %edx + +clear_fixed_mtrr: + add $-2, %ebx + movzwl fixed_mtrr_list(%ebx), %ecx wrmsr - add $2, %esi - dec %edi - jnz clear_mtrrs + jnz clear_fixed_mtrr /* Zero out all variable range MTRRs. */ movl $MTRR_CAP_MSR, %ecx @@ -82,6 +79,26 @@ clear_var_mtrrs: dec %edi jnz clear_var_mtrrs + /* Determine CPU_ADDR_BITS and load PHYSMASK high word to %edx. */ + movl $0x80000008, %eax + cpuid + movb %al, %cl + sub $32, %cl + movl $1, %edx + shl %cl, %edx + subl $1, %edx + + /* Preload high word of address mask (in %edx) for Variable + * MTRRs 0 and 1. + */ +addrsize_set_high: + xorl %eax, %eax + movl $MTRR_PHYS_MASK(0), %ecx + wrmsr + movl $MTRR_PHYS_MASK(1), %ecx + wrmsr + + post_code(0x23) /* Set Cache-as-RAM base address. */ movl $(MTRR_PHYS_BASE(0)), %ecx @@ -92,8 +109,8 @@ clear_var_mtrrs: post_code(0x24) /* Set Cache-as-RAM mask. */ movl $(MTRR_PHYS_MASK(0)), %ecx + rdmsr movl $(~(CACHE_AS_RAM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax - movl $CPU_PHYSMASK_HI, %edx wrmsr post_code(0x25) @@ -121,7 +138,6 @@ clear_var_mtrrs: movl $CACHE_AS_RAM_BASE, %esi movl %esi, %edi movl $(CACHE_AS_RAM_SIZE >> 2), %ecx - // movl $0x23322332, %eax xorl %eax, %eax rep stosl @@ -140,18 +156,12 @@ clear_var_mtrrs: /* Enable cache for our code in Flash because we do XIP here */ movl $MTRR_PHYS_BASE(1), %ecx xorl %edx, %edx - /* - * IMPORTANT: The following calculation _must_ be done at runtime. See - * https://www.coreboot.org/pipermail/coreboot/2010-October/060855.html - */ - movl $copy_and_run, %eax - andl $(~(CONFIG_XIP_ROM_SIZE - 1)), %eax - orl $MTRR_TYPE_WRPROT, %eax + movl $CACHE_ROM_BASE | MTRR_TYPE_WRPROT, %eax wrmsr movl $MTRR_PHYS_MASK(1), %ecx - movl $CPU_PHYSMASK_HI, %edx - movl $(~(CONFIG_XIP_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax + rdmsr + movl $(~(CACHE_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax wrmsr post_code(0x28) @@ -182,12 +192,18 @@ before_romstage: hlt jmp .Lhlt -mtrr_table: - /* Fixed MTRRs */ - .word 0x250, 0x258, 0x259 - .word 0x268, 0x269, 0x26A - .word 0x26B, 0x26C, 0x26D - .word 0x26E, 0x26F -mtrr_table_end: +fixed_mtrr_list: + .word MTRR_FIX_64K_00000 + .word MTRR_FIX_16K_80000 + .word MTRR_FIX_16K_A0000 + .word MTRR_FIX_4K_C0000 + .word MTRR_FIX_4K_C8000 + .word MTRR_FIX_4K_D0000 + .word MTRR_FIX_4K_D8000 + .word MTRR_FIX_4K_E0000 + .word MTRR_FIX_4K_E8000 + .word MTRR_FIX_4K_F0000 + .word MTRR_FIX_4K_F8000 +fixed_mtrr_list_size = . - fixed_mtrr_list _cache_as_ram_setup_end: |