diff options
Diffstat (limited to 'src/cpu/intel/haswell')
| -rw-r--r-- | src/cpu/intel/haswell/Makefile.inc | 5 | ||||
| -rw-r--r-- | src/cpu/intel/haswell/cache_as_ram.inc | 297 | ||||
| -rw-r--r-- | src/cpu/intel/haswell/haswell.h | 3 | ||||
| -rw-r--r-- | src/cpu/intel/haswell/romstage.c | 117 |
4 files changed, 26 insertions, 396 deletions
diff --git a/src/cpu/intel/haswell/Makefile.inc b/src/cpu/intel/haswell/Makefile.inc index dc7170b742..a0c892a561 100644 --- a/src/cpu/intel/haswell/Makefile.inc +++ b/src/cpu/intel/haswell/Makefile.inc @@ -9,17 +9,14 @@ ramstage-$(CONFIG_HAVE_SMI_HANDLER) += smmrelocate.c ramstage-y += monotonic_timer.c romstage-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c +postcar-$(CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM) += stage_cache.c smm-$(CONFIG_HAVE_SMI_HANDLER) += finalize.c smm-$(CONFIG_HAVE_SMI_HANDLER) += tsc_freq.c smm-y += monotonic_timer.c -ifneq ($(CONFIG_POSTCAR_STAGE),y) -cpu_incs-y += $(src)/cpu/intel/haswell/cache_as_ram.inc -else cpu_incs-y += $(src)/cpu/intel/car/non-evict/cache_as_ram.S postcar-y += ../car/non-evict/exit_car.S -endif subdirs-y += ../../x86/tsc subdirs-y += ../../x86/mtrr diff --git a/src/cpu/intel/haswell/cache_as_ram.inc b/src/cpu/intel/haswell/cache_as_ram.inc deleted file mode 100644 index 388c2ea23c..0000000000 --- a/src/cpu/intel/haswell/cache_as_ram.inc +++ /dev/null @@ -1,297 +0,0 @@ -/* - * This file is part of the coreboot project. - * - * Copyright (C) 2000,2007 Ronald G. Minnich <rminnich@gmail.com> - * Copyright (C) 2007-2008 coresystems GmbH - * - * 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 - * the Free Software Foundation; version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <cpu/x86/mtrr.h> -#include <cpu/x86/cache.h> -#include <cpu/x86/post_code.h> - -/* The full cache-as-ram size includes the cache-as-ram portion from coreboot - * and the space used by the reference code. These 2 values combined should - * be a power of 2 because the MTRR setup assumes that. */ -#define CACHE_AS_RAM_SIZE \ - (CONFIG_DCACHE_RAM_SIZE + CONFIG_DCACHE_RAM_MRC_VAR_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 - - /* 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) - - /* All CPUs need to be in Wait for SIPI state */ -wait_for_sipi: - movl (%esi), %eax - bt $12, %eax - jc wait_for_sipi - - post_code(0x21) - /* Zero out all fixed range and variable 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 - wrmsr - add $2, %esi - dec %edi - jnz clear_mtrrs - - post_code(0x22) - /* Configure the default memory type to uncacheable. */ - movl $MTRR_DEF_TYPE_MSR, %ecx - rdmsr - andl $(~0x00000cff), %eax - wrmsr - - post_code(0x23) - /* Set Cache-as-RAM base address. */ - movl $(MTRR_PHYS_BASE(0)), %ecx - movl $(CACHE_AS_RAM_BASE | MTRR_TYPE_WRBACK), %eax - xorl %edx, %edx - wrmsr - - post_code(0x24) - /* Set Cache-as-RAM mask. */ - movl $(MTRR_PHYS_MASK(0)), %ecx - movl $(~(CACHE_AS_RAM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax - movl $CPU_PHYSMASK_HI, %edx - wrmsr - - post_code(0x25) - - /* 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 $(~(CR0_CacheDisable | CR0_NoWriteThrough)), %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 >> 2), %ecx - // movl $0x23322332, %eax - xorl %eax, %eax - rep stosl - - /* enable the 'no eviction run' state */ - movl $NoEvictMod_MSR, %ecx - rdmsr - orl $3, %eax - wrmsr - - post_code(0x26) - /* Enable Cache-as-RAM mode by disabling cache. */ - movl %cr0, %eax - orl $CR0_CacheDisable, %eax - movl %eax, %cr0 - - /* 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 - wrmsr - - movl $MTRR_PHYS_MASK(1), %ecx - movl $CPU_PHYSMASK_HI, %edx - movl $(~(CONFIG_XIP_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID), %eax - wrmsr - - post_code(0x27) - /* Enable caching for RAM init code to run faster */ - movl $MTRR_PHYS_BASE(2), %ecx - movl $(CACHE_MRC_BASE | MTRR_TYPE_WRPROT), %eax - xorl %edx, %edx - wrmsr - movl $MTRR_PHYS_MASK(2), %ecx - movl $(CACHE_MRC_MASK | MTRR_PHYS_MASK_VALID), %eax - movl $CPU_PHYSMASK_HI, %edx - wrmsr - - post_code(0x28) - /* Enable cache. */ - movl %cr0, %eax - andl $(~(CR0_CacheDisable | CR0_NoWriteThrough)), %eax - movl %eax, %cr0 - - /* Setup the stack. */ - movl $(CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE), %eax - movl %eax, %esp - - /* Restore the BIST result. */ - movl %ebp, %eax - movl %esp, %ebp - pushl %eax - -before_romstage: - post_code(0x29) - /* Call romstage.c main function. */ - call romstage_main - /* Save return value from romstage_main. It contains the stack to use - * after cache-as-ram is torn down. It also contains the information - * for setting up MTRRs. */ - movl %eax, %esp - - post_code(0x30) - - /* Disable cache. */ - movl %cr0, %eax - orl $CR0_CacheDisable, %eax - movl %eax, %cr0 - - post_code(0x31) - - /* Disable MTRR. */ - movl $MTRR_DEF_TYPE_MSR, %ecx - rdmsr - andl $(~MTRR_DEF_TYPE_EN), %eax - wrmsr - - post_code(0x32) - - /* 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 - - post_code(0x33) - - /* Enable cache. */ - movl %cr0, %eax - andl $~(CR0_CacheDisable | CR0_NoWriteThrough), %eax - movl %eax, %cr0 - - post_code(0x36) - - /* Disable cache. */ - movl %cr0, %eax - orl $CR0_CacheDisable, %eax - movl %eax, %cr0 - - post_code(0x38) - - /* Get number of MTRRs. */ - popl %ebx - movl $MTRR_PHYS_BASE(0), %ecx -1: - testl %ebx, %ebx - jz 1f - - /* Low 32 bits of MTRR base. */ - popl %eax - /* Upper 32 bits of MTRR base. */ - popl %edx - /* Write MTRR base. */ - wrmsr - inc %ecx - /* Low 32 bits of MTRR mask. */ - popl %eax - /* Upper 32 bits of MTRR mask. */ - popl %edx - /* Write MTRR mask. */ - wrmsr - inc %ecx - - dec %ebx - jmp 1b -1: - post_code(0x39) - - /* And enable cache again after setting MTRRs. */ - movl %cr0, %eax - andl $~(CR0_CacheDisable | CR0_NoWriteThrough), %eax - movl %eax, %cr0 - - post_code(0x3a) - - /* Enable MTRR. */ - movl $MTRR_DEF_TYPE_MSR, %ecx - rdmsr - orl $MTRR_DEF_TYPE_EN, %eax - wrmsr - - post_code(0x3b) - - /* Invalidate the cache again. */ - invd - - post_code(0x3c) - -__main: - post_code(POST_PREPARE_RAMSTAGE) - cld /* Clear direction flag. */ - call romstage_after_car - -.Lhlt: - 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 - /* 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: diff --git a/src/cpu/intel/haswell/haswell.h b/src/cpu/intel/haswell/haswell.h index 6612509e49..23efe6c443 100644 --- a/src/cpu/intel/haswell/haswell.h +++ b/src/cpu/intel/haswell/haswell.h @@ -181,9 +181,6 @@ void romstage_common(const struct romstage_params *params); * ... */ asmlinkage void *romstage_main(unsigned long bist); -/* romstage_after_car() is the C function called after cache-as-ram has - * been torn down. It is responsible for loading the ramstage. */ -asmlinkage void romstage_after_car(void); #endif #ifdef __SMM__ diff --git a/src/cpu/intel/haswell/romstage.c b/src/cpu/intel/haswell/romstage.c index 1c293d4647..ab9fd591be 100644 --- a/src/cpu/intel/haswell/romstage.c +++ b/src/cpu/intel/haswell/romstage.c @@ -50,100 +50,39 @@ static inline void reset_system(void) halt(); } -/* The cache-as-ram assembly file calls romstage_main() after setting up - * cache-as-ram. romstage_main() will then call the mainboards's - * mainboard_romstage_entry() function. That function then calls - * romstage_common() below. The reason for the back and forth is to provide - * common entry point from cache-as-ram while still allowing for code sharing. - * Because we can't use global variables the stack is used for allocations -- - * thus the need to call back and forth. */ +#define ROMSTAGE_RAM_STACK_SIZE 0x5000 - -static inline u32 *stack_push(u32 *stack, u32 value) -{ - stack = &stack[-1]; - *stack = value; - return stack; -} - -/* setup_romstage_stack_after_car() determines the stack to use after - * cache-as-ram is torn down as well as the MTRR settings to use. */ -static void *setup_romstage_stack_after_car(void) +/* platform_enter_postcar() determines the stack to use after + * cache-as-ram is torn down as well as the MTRR settings to use, + * and continues execution in postcar stage. */ +static void platform_enter_postcar(void) { - int num_mtrrs; - u32 *slot; - u32 mtrr_mask_upper; - u32 top_of_ram; - - /* Top of stack needs to be aligned to a 4-byte boundary. */ - slot = (void *)romstage_ram_stack_top(); - num_mtrrs = 0; - - /* The upper bits of the MTRR mask need to set according to the number - * of physical address bits. */ - mtrr_mask_upper = (1 << (cpu_phys_address_size() - 32)) - 1; - - /* The order for each MTRR is value then base with upper 32-bits of - * each value coming before the lower 32-bits. The reasoning for - * this ordering is to create a stack layout like the following: - * +0: Number of MTRRs - * +4: MTRR base 0 31:0 - * +8: MTRR base 0 63:32 - * +12: MTRR mask 0 31:0 - * +16: MTRR mask 0 63:32 - * +20: MTRR base 1 31:0 - * +24: MTRR base 1 63:32 - * +28: MTRR mask 1 31:0 - * +32: MTRR mask 1 63:32 - */ + struct postcar_frame pcf; + uintptr_t top_of_ram; + if (postcar_frame_init(&pcf, ROMSTAGE_RAM_STACK_SIZE)) + die("Unable to initialize postcar frame.\n"); /* Cache the ROM as WP just below 4GiB. */ - slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ - slot = stack_push(slot, ~(CACHE_ROM_SIZE - 1) | MTRR_PHYS_MASK_VALID); - slot = stack_push(slot, 0); /* upper base */ - slot = stack_push(slot, ~(CACHE_ROM_SIZE - 1) | MTRR_TYPE_WRPROT); - num_mtrrs++; + postcar_frame_add_mtrr(&pcf, CACHE_ROM_BASE, CACHE_ROM_SIZE, + MTRR_TYPE_WRPROT); /* Cache RAM as WB from 0 -> CACHE_TMP_RAMTOP. */ - slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ - slot = stack_push(slot, ~(CACHE_TMP_RAMTOP - 1) | MTRR_PHYS_MASK_VALID); - slot = stack_push(slot, 0); /* upper base */ - slot = stack_push(slot, 0 | MTRR_TYPE_WRBACK); - num_mtrrs++; - - top_of_ram = (uint32_t)cbmem_top(); - /* Cache 8MiB below the top of RAM. On haswell systems the top of - * RAM under 4GiB is the start of the TSEG region. It is required to - * be 8MiB aligned. Set this area as cacheable so it can be used later - * for ramstage before setting up the entire RAM as cacheable. */ - slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ - slot = stack_push(slot, ~((8 << 20) - 1) | MTRR_PHYS_MASK_VALID); - slot = stack_push(slot, 0); /* upper base */ - slot = stack_push(slot, (top_of_ram - (8 << 20)) | MTRR_TYPE_WRBACK); - num_mtrrs++; - - /* Cache 8MiB at the top of RAM. Top of RAM on haswell systems - * is where the TSEG region resides. However, it is not restricted - * to SMM mode until SMM has been relocated. By setting the region - * to cacheable it provides faster access when relocating the SMM - * handler as well as using the TSEG region for other purposes. */ - slot = stack_push(slot, mtrr_mask_upper); /* upper mask */ - slot = stack_push(slot, ~((8 << 20) - 1) | MTRR_PHYS_MASK_VALID); - slot = stack_push(slot, 0); /* upper base */ - slot = stack_push(slot, top_of_ram | MTRR_TYPE_WRBACK); - num_mtrrs++; - - /* Save the number of MTRRs to setup. Return the stack location - * pointing to the number of MTRRs. */ - slot = stack_push(slot, num_mtrrs); - - return slot; + postcar_frame_add_mtrr(&pcf, 0, CACHE_TMP_RAMTOP, MTRR_TYPE_WRBACK); + + /* Cache at least 8 MiB below the top of ram, and at most 8 MiB + * above top of the ram. This satisfies MTRR alignment requirement + * with different TSEG size configurations. + */ + top_of_ram = ALIGN_DOWN((uintptr_t)cbmem_top(), 8*MiB); + postcar_frame_add_mtrr(&pcf, top_of_ram - 8*MiB, 16*MiB, + MTRR_TYPE_WRBACK); + + run_postcar_phase(&pcf); } asmlinkage void *romstage_main(unsigned long bist) { int i; - void *romstage_stack_after_car; const int num_guards = 4; const u32 stack_guard = 0xdeadbeef; u32 *stack_base = (void *)(CONFIG_DCACHE_RAM_BASE + @@ -163,10 +102,10 @@ asmlinkage void *romstage_main(unsigned long bist) printk(BIOS_DEBUG, "Smashed stack detected in romstage!\n"); } - /* Get the stack to use after cache-as-ram is torn down. */ - romstage_stack_after_car = setup_romstage_stack_after_car(); + platform_enter_postcar(); - return romstage_stack_after_car; + /* We do not return here */ + return NULL; } void romstage_common(const struct romstage_params *params) @@ -248,9 +187,3 @@ void romstage_common(const struct romstage_params *params) if (IS_ENABLED(CONFIG_TPM1) || IS_ENABLED(CONFIG_TPM2)) tpm_setup(wake_from_s3); } - -asmlinkage void romstage_after_car(void) -{ - /* Load the ramstage. */ - run_ramstage(); -} |