From 1223d737a38dab7f05e7d62a3c931e28aa1e1495 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Fri, 11 Mar 2016 22:06:53 -0700 Subject: x86: Move cache-as-RAM code into a common location This cache-as-RAM (CAR) code is common to several Intel chips. Create a new intel_common directory and move it in there. Signed-off-by: Simon Glass Reviewed-by: Bin Meng diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile index 2ff2377..2583809 100644 --- a/arch/x86/cpu/Makefile +++ b/arch/x86/cpu/Makefile @@ -18,6 +18,7 @@ AFLAGS_call32.o := -fpic -fshort-wchar extra-y += call32.o +obj-y += intel_common/ obj-$(CONFIG_INTEL_BAYTRAIL) += baytrail/ obj-$(CONFIG_SYS_COREBOOT) += coreboot/ obj-$(CONFIG_EFI_APP) += efi/ diff --git a/arch/x86/cpu/intel_common/Makefile b/arch/x86/cpu/intel_common/Makefile new file mode 100644 index 0000000..5dd9573 --- /dev/null +++ b/arch/x86/cpu/intel_common/Makefile @@ -0,0 +1,7 @@ +# +# Copyright (c) 2016 Google, Inc +# +# SPDX-License-Identifier: GPL-2.0+ +# + +obj-$(CONFIG_HAVE_MRC) += car.o diff --git a/arch/x86/cpu/intel_common/car.S b/arch/x86/cpu/intel_common/car.S new file mode 100644 index 0000000..1defabf --- /dev/null +++ b/arch/x86/cpu/intel_common/car.S @@ -0,0 +1,241 @@ +/* + * Copyright (c) 2014 Google, Inc + * + * From Coreboot file cpu/intel/model_206ax/cache_as_ram.inc + * + * Copyright (C) 2000,2007 Ronald G. Minnich + * Copyright (C) 2005 Tyan (written by Yinghai Lu for Tyan) + * Copyright (C) 2007-2008 coresystems GmbH + * Copyright (C) 2012 Kyösti Mälkki + * + * SPDX-License-Identifier: GPL-2.0 + */ + +#include +#include +#include +#include +#include +#include +#include + +#define MTRR_PHYS_BASE_MSR(reg) (0x200 + 2 * (reg)) +#define MTRR_PHYS_MASK_MSR(reg) (0x200 + 2 * (reg) + 1) + +#define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE +#define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE + +/* Cache 4GB - MRC_SIZE_KB for MRC */ +#define CACHE_MRC_BYTES ((CONFIG_CACHE_MRC_SIZE_KB << 10) - 1) +#define CACHE_MRC_BASE (0xFFFFFFFF - CACHE_MRC_BYTES) +#define CACHE_MRC_MASK (~CACHE_MRC_BYTES) + +#define CPU_PHYSMASK_HI (1 << (CONFIG_CPU_ADDR_BITS - 32) - 1) + +#define NOEVICTMOD_MSR 0x2e0 + + /* + * Note: ebp must not be touched in this code as it holds the BIST + * value (built-in self test). We preserve this value until it can + * be written to global_data when CAR is ready for use. + */ +.globl car_init +car_init: + post_code(POST_CAR_START) + + /* Send INIT IPI to all excluding ourself */ + movl $0x000C4500, %eax + movl $0xFEE00300, %esi + movl %eax, (%esi) + + /* TODO: Load microcode later - the 'no eviction' mode breaks this */ + movl $MSR_IA32_UCODE_WRITE, %ecx + xorl %edx, %edx + movl $_dt_ucode_base_size, %eax + movl (%eax), %eax + addl $UCODE_HEADER_LEN, %eax + wrmsr + + post_code(POST_CAR_SIPI) + /* 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 +clear_mtrrs: + movw (%esi), %bx + movzx %bx, %ecx + wrmsr + add $2, %esi + dec %edi + jnz clear_mtrrs + + post_code(POST_CAR_MTRR) + /* Configure the default memory type to uncacheable */ + movl $MTRR_DEF_TYPE_MSR, %ecx + rdmsr + andl $(~0x00000cff), %eax + wrmsr + + post_code(POST_CAR_UNCACHEABLE) + /* Set Cache-as-RAM base address */ + movl $(MTRR_PHYS_BASE_MSR(0)), %ecx + movl $(CACHE_AS_RAM_BASE | MTRR_TYPE_WRBACK), %eax + xorl %edx, %edx + wrmsr + + post_code(POST_CAR_BASE_ADDRESS) + /* Set Cache-as-RAM mask */ + movl $(MTRR_PHYS_MASK_MSR(0)), %ecx + movl $(~(CACHE_AS_RAM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax + movl $CPU_PHYSMASK_HI, %edx + wrmsr + + post_code(POST_CAR_MASK) + + /* Enable MTRR */ + movl $MTRR_DEF_TYPE_MSR, %ecx + rdmsr + orl $MTRR_DEF_TYPE_EN, %eax + wrmsr + + /* Enable cache (CR0.CD = 0, CR0.NW = 0) */ + movl %cr0, %eax + andl $(~(X86_CR0_CD | X86_CR0_NW)), %eax + invd + movl %eax, %cr0 + + /* enable the 'no eviction' mode */ + movl $NOEVICTMOD_MSR, %ecx + rdmsr + orl $1, %eax + andl $~2, %eax + wrmsr + + /* Clear the cache memory region. This will also fill up the cache */ + movl $CACHE_AS_RAM_BASE, %esi + movl %esi, %edi + movl $(CACHE_AS_RAM_SIZE / 4), %ecx + xorl %eax, %eax + rep stosl + + /* enable the 'no eviction run' state */ + movl $NOEVICTMOD_MSR, %ecx + rdmsr + orl $3, %eax + wrmsr + + post_code(POST_CAR_FILL) + /* Enable Cache-as-RAM mode by disabling cache */ + movl %cr0, %eax + orl $X86_CR0_CD, %eax + movl %eax, %cr0 + + /* Enable cache for our code in Flash because we do XIP here */ + movl $MTRR_PHYS_BASE_MSR(1), %ecx + xorl %edx, %edx + movl $car_init_ret, %eax + andl $(~(CONFIG_XIP_ROM_SIZE - 1)), %eax + orl $MTRR_TYPE_WRPROT, %eax + wrmsr + + movl $MTRR_PHYS_MASK_MSR(1), %ecx + movl $CPU_PHYSMASK_HI, %edx + movl $(~(CONFIG_XIP_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax + wrmsr + + post_code(POST_CAR_ROM_CACHE) +#ifdef CONFIG_CACHE_MRC_BIN + /* Enable caching for ram init code to run faster */ + movl $MTRR_PHYS_BASE_MSR(2), %ecx + movl $(CACHE_MRC_BASE | MTRR_TYPE_WRPROT), %eax + xorl %edx, %edx + wrmsr + movl $MTRR_PHYS_MASK_MSR(2), %ecx + movl $(CACHE_MRC_MASK | MTRR_PHYS_MASK_VALID), %eax + movl $CPU_PHYSMASK_HI, %edx + wrmsr +#endif + + post_code(POST_CAR_MRC_CACHE) + /* Enable cache */ + movl %cr0, %eax + andl $(~(X86_CR0_CD | X86_CR0_NW)), %eax + movl %eax, %cr0 + + post_code(POST_CAR_CPU_CACHE) + + /* All CPUs need to be in Wait for SIPI state */ +wait_for_sipi: + movl (%esi), %eax + bt $12, %eax + jc wait_for_sipi + + /* return */ + jmp car_init_ret + +.globl car_uninit +car_uninit: + /* Disable cache */ + movl %cr0, %eax + orl $X86_CR0_CD, %eax + movl %eax, %cr0 + + /* Disable MTRRs */ + movl $MTRR_DEF_TYPE_MSR, %ecx + rdmsr + andl $(~MTRR_DEF_TYPE_EN), %eax + wrmsr + + /* Disable the no-eviction run state */ + movl $NOEVICTMOD_MSR, %ecx + rdmsr + andl $~2, %eax + wrmsr + + invd + + /* Disable the no-eviction mode */ + rdmsr + andl $~1, %eax + wrmsr + +#ifdef CONFIG_CACHE_MRC_BIN + /* Clear the MTRR that was used to cache MRC */ + xorl %eax, %eax + xorl %edx, %edx + movl $MTRR_PHYS_BASE_MSR(2), %ecx + wrmsr + movl $MTRR_PHYS_MASK_MSR(2), %ecx + wrmsr +#endif + + /* Enable MTRRs */ + movl $MTRR_DEF_TYPE_MSR, %ecx + rdmsr + orl $MTRR_DEF_TYPE_EN, %eax + wrmsr + + invd + + ret + +mtrr_table: + /* Fixed MTRRs */ + .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 0x210, 0x211, 0x212, 0x213 +mtrr_table_end: + + .align 4 +_dt_ucode_base_size: + /* These next two fields are filled in by ifdtool */ + .long 0 /* microcode base */ + .long 0 /* microcode size */ diff --git a/arch/x86/cpu/ivybridge/Makefile b/arch/x86/cpu/ivybridge/Makefile index 9203219..b117f0d 100644 --- a/arch/x86/cpu/ivybridge/Makefile +++ b/arch/x86/cpu/ivybridge/Makefile @@ -7,7 +7,6 @@ ifdef CONFIG_HAVE_FSP obj-y += fsp_configs.o ivybridge.o else -obj-y += car.o obj-y += cpu.o obj-y += early_me.o obj-y += gma.o diff --git a/arch/x86/cpu/ivybridge/car.S b/arch/x86/cpu/ivybridge/car.S deleted file mode 100644 index 1defabf..0000000 --- a/arch/x86/cpu/ivybridge/car.S +++ /dev/null @@ -1,241 +0,0 @@ -/* - * Copyright (c) 2014 Google, Inc - * - * From Coreboot file cpu/intel/model_206ax/cache_as_ram.inc - * - * Copyright (C) 2000,2007 Ronald G. Minnich - * Copyright (C) 2005 Tyan (written by Yinghai Lu for Tyan) - * Copyright (C) 2007-2008 coresystems GmbH - * Copyright (C) 2012 Kyösti Mälkki - * - * SPDX-License-Identifier: GPL-2.0 - */ - -#include -#include -#include -#include -#include -#include -#include - -#define MTRR_PHYS_BASE_MSR(reg) (0x200 + 2 * (reg)) -#define MTRR_PHYS_MASK_MSR(reg) (0x200 + 2 * (reg) + 1) - -#define CACHE_AS_RAM_SIZE CONFIG_DCACHE_RAM_SIZE -#define CACHE_AS_RAM_BASE CONFIG_DCACHE_RAM_BASE - -/* Cache 4GB - MRC_SIZE_KB for MRC */ -#define CACHE_MRC_BYTES ((CONFIG_CACHE_MRC_SIZE_KB << 10) - 1) -#define CACHE_MRC_BASE (0xFFFFFFFF - CACHE_MRC_BYTES) -#define CACHE_MRC_MASK (~CACHE_MRC_BYTES) - -#define CPU_PHYSMASK_HI (1 << (CONFIG_CPU_ADDR_BITS - 32) - 1) - -#define NOEVICTMOD_MSR 0x2e0 - - /* - * Note: ebp must not be touched in this code as it holds the BIST - * value (built-in self test). We preserve this value until it can - * be written to global_data when CAR is ready for use. - */ -.globl car_init -car_init: - post_code(POST_CAR_START) - - /* Send INIT IPI to all excluding ourself */ - movl $0x000C4500, %eax - movl $0xFEE00300, %esi - movl %eax, (%esi) - - /* TODO: Load microcode later - the 'no eviction' mode breaks this */ - movl $MSR_IA32_UCODE_WRITE, %ecx - xorl %edx, %edx - movl $_dt_ucode_base_size, %eax - movl (%eax), %eax - addl $UCODE_HEADER_LEN, %eax - wrmsr - - post_code(POST_CAR_SIPI) - /* 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 -clear_mtrrs: - movw (%esi), %bx - movzx %bx, %ecx - wrmsr - add $2, %esi - dec %edi - jnz clear_mtrrs - - post_code(POST_CAR_MTRR) - /* Configure the default memory type to uncacheable */ - movl $MTRR_DEF_TYPE_MSR, %ecx - rdmsr - andl $(~0x00000cff), %eax - wrmsr - - post_code(POST_CAR_UNCACHEABLE) - /* Set Cache-as-RAM base address */ - movl $(MTRR_PHYS_BASE_MSR(0)), %ecx - movl $(CACHE_AS_RAM_BASE | MTRR_TYPE_WRBACK), %eax - xorl %edx, %edx - wrmsr - - post_code(POST_CAR_BASE_ADDRESS) - /* Set Cache-as-RAM mask */ - movl $(MTRR_PHYS_MASK_MSR(0)), %ecx - movl $(~(CACHE_AS_RAM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax - movl $CPU_PHYSMASK_HI, %edx - wrmsr - - post_code(POST_CAR_MASK) - - /* Enable MTRR */ - movl $MTRR_DEF_TYPE_MSR, %ecx - rdmsr - orl $MTRR_DEF_TYPE_EN, %eax - wrmsr - - /* Enable cache (CR0.CD = 0, CR0.NW = 0) */ - movl %cr0, %eax - andl $(~(X86_CR0_CD | X86_CR0_NW)), %eax - invd - movl %eax, %cr0 - - /* enable the 'no eviction' mode */ - movl $NOEVICTMOD_MSR, %ecx - rdmsr - orl $1, %eax - andl $~2, %eax - wrmsr - - /* Clear the cache memory region. This will also fill up the cache */ - movl $CACHE_AS_RAM_BASE, %esi - movl %esi, %edi - movl $(CACHE_AS_RAM_SIZE / 4), %ecx - xorl %eax, %eax - rep stosl - - /* enable the 'no eviction run' state */ - movl $NOEVICTMOD_MSR, %ecx - rdmsr - orl $3, %eax - wrmsr - - post_code(POST_CAR_FILL) - /* Enable Cache-as-RAM mode by disabling cache */ - movl %cr0, %eax - orl $X86_CR0_CD, %eax - movl %eax, %cr0 - - /* Enable cache for our code in Flash because we do XIP here */ - movl $MTRR_PHYS_BASE_MSR(1), %ecx - xorl %edx, %edx - movl $car_init_ret, %eax - andl $(~(CONFIG_XIP_ROM_SIZE - 1)), %eax - orl $MTRR_TYPE_WRPROT, %eax - wrmsr - - movl $MTRR_PHYS_MASK_MSR(1), %ecx - movl $CPU_PHYSMASK_HI, %edx - movl $(~(CONFIG_XIP_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax - wrmsr - - post_code(POST_CAR_ROM_CACHE) -#ifdef CONFIG_CACHE_MRC_BIN - /* Enable caching for ram init code to run faster */ - movl $MTRR_PHYS_BASE_MSR(2), %ecx - movl $(CACHE_MRC_BASE | MTRR_TYPE_WRPROT), %eax - xorl %edx, %edx - wrmsr - movl $MTRR_PHYS_MASK_MSR(2), %ecx - movl $(CACHE_MRC_MASK | MTRR_PHYS_MASK_VALID), %eax - movl $CPU_PHYSMASK_HI, %edx - wrmsr -#endif - - post_code(POST_CAR_MRC_CACHE) - /* Enable cache */ - movl %cr0, %eax - andl $(~(X86_CR0_CD | X86_CR0_NW)), %eax - movl %eax, %cr0 - - post_code(POST_CAR_CPU_CACHE) - - /* All CPUs need to be in Wait for SIPI state */ -wait_for_sipi: - movl (%esi), %eax - bt $12, %eax - jc wait_for_sipi - - /* return */ - jmp car_init_ret - -.globl car_uninit -car_uninit: - /* Disable cache */ - movl %cr0, %eax - orl $X86_CR0_CD, %eax - movl %eax, %cr0 - - /* Disable MTRRs */ - movl $MTRR_DEF_TYPE_MSR, %ecx - rdmsr - andl $(~MTRR_DEF_TYPE_EN), %eax - wrmsr - - /* Disable the no-eviction run state */ - movl $NOEVICTMOD_MSR, %ecx - rdmsr - andl $~2, %eax - wrmsr - - invd - - /* Disable the no-eviction mode */ - rdmsr - andl $~1, %eax - wrmsr - -#ifdef CONFIG_CACHE_MRC_BIN - /* Clear the MTRR that was used to cache MRC */ - xorl %eax, %eax - xorl %edx, %edx - movl $MTRR_PHYS_BASE_MSR(2), %ecx - wrmsr - movl $MTRR_PHYS_MASK_MSR(2), %ecx - wrmsr -#endif - - /* Enable MTRRs */ - movl $MTRR_DEF_TYPE_MSR, %ecx - rdmsr - orl $MTRR_DEF_TYPE_EN, %eax - wrmsr - - invd - - ret - -mtrr_table: - /* Fixed MTRRs */ - .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 0x210, 0x211, 0x212, 0x213 -mtrr_table_end: - - .align 4 -_dt_ucode_base_size: - /* These next two fields are filled in by ifdtool */ - .long 0 /* microcode base */ - .long 0 /* microcode size */ -- cgit v0.10.2