Vladimir Serbinenko (phcoder@gmail.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5146
-gerrit
commit 85edbea369ed55b3a071862d5d4182219376be22 Author: Vladimir Serbinenko phcoder@gmail.com Date: Wed Feb 5 19:46:45 2014 +0100
Remove CACHE_ROM.
With the improvements down in this patch stack, speed up by CACHE_ROM is reduced a lot. On the other hand this makes coreboot run out of MTRRs on all systems I tried it on, hence screwing up I/O access and cahce coherency in worst cases.
Remove this as a buggy feature until we figure out how todo it properly if necessarry.
Change-Id: I858d78a907bf042fcc21fdf7a2bf899e9f6b591d Signed-off-by: Vladimir Serbinenko phcoder@gmail.com --- src/cpu/x86/Kconfig | 7 --- src/cpu/x86/mtrr/mtrr.c | 76 --------------------------- src/include/cpu/x86/mtrr.h | 20 +------ src/mainboard/google/Kconfig | 5 -- src/mainboard/google/bolt/Kconfig | 1 - src/mainboard/google/falco/Kconfig | 1 - src/mainboard/google/peppy/Kconfig | 1 - src/mainboard/google/slippy/Kconfig | 1 - src/mainboard/intel/wtm2/Kconfig | 1 - src/northbridge/intel/fsp_sandybridge/Kconfig | 4 -- src/soc/intel/baytrail/Kconfig | 1 - 11 files changed, 2 insertions(+), 116 deletions(-)
diff --git a/src/cpu/x86/Kconfig b/src/cpu/x86/Kconfig index 21282c3..4425ed3 100644 --- a/src/cpu/x86/Kconfig +++ b/src/cpu/x86/Kconfig @@ -76,13 +76,6 @@ config LOGICAL_CPUS bool default y
-config CACHE_ROM - bool "Allow for caching system ROM." - default n - help - When selected a variable range MTRR is allocated for coreboot and - the bootloader enables caching of the system ROM for faster access. - config SMM_TSEG bool default n diff --git a/src/cpu/x86/mtrr/mtrr.c b/src/cpu/x86/mtrr/mtrr.c index dbedf0f..54fdfd8 100644 --- a/src/cpu/x86/mtrr/mtrr.c +++ b/src/cpu/x86/mtrr/mtrr.c @@ -185,16 +185,6 @@ static struct memranges *get_physical_address_space(void) memranges_add_resources(addr_space, mask, match, MTRR_TYPE_WRCOMB);
-#if CONFIG_CACHE_ROM - /* Add a write-protect region covering the ROM size - * when CONFIG_CACHE_ROM is enabled. The ROM is assumed - * to be located at 4GiB - rom size. */ - resource_t rom_base = RANGE_TO_PHYS_ADDR( - RANGE_4GB - PHYS_TO_RANGE_ADDR(CACHE_ROM_SIZE)); - memranges_insert(addr_space, rom_base, CACHE_ROM_SIZE, - MTRR_TYPE_WRPROT); -#endif - /* The address space below 4GiB is special. It needs to be * covered entirly by range entries so that MTRR calculations * can be properly done for the full 32-bit address space. @@ -366,61 +356,6 @@ void x86_setup_fixed_mtrrs(void) enable_fixed_mtrr(); }
-/* Keep track of the MTRR that covers the ROM for caching purposes. */ -#if CONFIG_CACHE_ROM -static long rom_cache_mtrr = -1; - -long x86_mtrr_rom_cache_var_index(void) -{ - return rom_cache_mtrr; -} - -void x86_mtrr_enable_rom_caching(void) -{ - msr_t msr_val; - unsigned long index; - - if (rom_cache_mtrr < 0) - return; - - index = rom_cache_mtrr; - disable_cache(); - msr_val = rdmsr(MTRRphysBase_MSR(index)); - msr_val.lo &= ~0xff; - msr_val.lo |= MTRR_TYPE_WRPROT; - wrmsr(MTRRphysBase_MSR(index), msr_val); - enable_cache(); -} - -void x86_mtrr_disable_rom_caching(void) -{ - msr_t msr_val; - unsigned long index; - - if (rom_cache_mtrr < 0) - return; - - index = rom_cache_mtrr; - disable_cache(); - msr_val = rdmsr(MTRRphysBase_MSR(index)); - msr_val.lo &= ~0xff; - wrmsr(MTRRphysBase_MSR(index), msr_val); - enable_cache(); -} - -static void disable_cache_rom(void *unused) -{ - x86_mtrr_disable_rom_caching(); -} - -BOOT_STATE_INIT_ENTRIES(disable_rom_cache_bscb) = { - BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, - disable_cache_rom, NULL), - BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, - disable_cache_rom, NULL), -}; -#endif - struct var_mtrr_state { struct memranges *addr_space; int above4gb; @@ -468,17 +403,6 @@ static void write_var_mtrr(struct var_mtrr_state *var_state, mask = (1ULL << var_state->address_bits) - 1; rsize = rsize & mask;
-#if CONFIG_CACHE_ROM - /* CONFIG_CACHE_ROM allocates an MTRR specifically for allowing - * one to turn on caching for faster ROM access. However, it is - * left to the MTRR callers to enable it. */ - if (mtrr_type == MTRR_TYPE_WRPROT) { - mtrr_type = MTRR_TYPE_UNCACHEABLE; - if (rom_cache_mtrr < 0) - rom_cache_mtrr = var_state->mtrr_index; - } -#endif - printk(BIOS_DEBUG, "MTRR: %d base 0x%016llx mask 0x%016llx type %d\n", var_state->mtrr_index, rbase, rsize, mtrr_type);
diff --git a/src/include/cpu/x86/mtrr.h b/src/include/cpu/x86/mtrr.h index 9414687..d6cf039 100644 --- a/src/include/cpu/x86/mtrr.h +++ b/src/include/cpu/x86/mtrr.h @@ -52,10 +52,6 @@ * of the nature of the global MTRR enable flag. Therefore, all direct * or indirect callers of enable_fixed_mtrr() should ensure that the * variable MTRR MSRs do not contain bad ranges. - * 3. If CONFIG_CACHE_ROM is selected an MTRR is allocated for enabling - * the caching of the ROM. However, it is set to uncacheable (UC). It - * is the responsibility of the caller to enable it by calling - * x86_mtrr_enable_rom_caching(). */ void x86_setup_mtrrs(void); /* @@ -71,24 +67,12 @@ void x86_setup_fixed_mtrrs(void); /* Set up fixed MTRRs but do not enable them. */ void x86_setup_fixed_mtrrs_no_enable(void); int x86_mtrr_check(void); -/* ROM caching can be used after variable MTRRs are set up. Beware that - * enabling CONFIG_CACHE_ROM will eat through quite a few MTRRs based on - * one's IO hole size and WRCOMB resources. Be sure to check the console - * log when enabling CONFIG_CACHE_ROM or adding WRCOMB resources. Beware that +/* ROM caching can be used after variable MTRRs are set up. + * Be sure to check the console log when adding WRCOMB resources. Beware that * on CPUs with core-scoped MTRR registers such as hyperthreaded CPUs the * rom caching will be disabled if all threads run the MTRR code. Therefore, * one needs to call x86_mtrr_enable_rom_caching() after all threads of the * same core have run the MTRR code. */ -#if CONFIG_CACHE_ROM -void x86_mtrr_enable_rom_caching(void); -void x86_mtrr_disable_rom_caching(void); -/* Return the variable range MTRR index of the ROM cache. */ -long x86_mtrr_rom_cache_var_index(void); -#else -static inline void x86_mtrr_enable_rom_caching(void) {} -static inline void x86_mtrr_disable_rom_caching(void) {} -static inline long x86_mtrr_rom_cache_var_index(void) { return -1; } -#endif /* CONFIG_CACHE_ROM */
#endif
diff --git a/src/mainboard/google/Kconfig b/src/mainboard/google/Kconfig index b86b0ad..85c8592 100644 --- a/src/mainboard/google/Kconfig +++ b/src/mainboard/google/Kconfig @@ -18,11 +18,6 @@ ## if VENDOR_GOOGLE
-# Auto select common options -config VENDOR_SPECIFIC_OPTIONS - def_bool y - select CACHE_ROM - choice prompt "Mainboard model"
diff --git a/src/mainboard/google/bolt/Kconfig b/src/mainboard/google/bolt/Kconfig index 1d2b259..3004443 100644 --- a/src/mainboard/google/bolt/Kconfig +++ b/src/mainboard/google/bolt/Kconfig @@ -18,7 +18,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy select HAVE_SMI_HANDLER select MAINBOARD_HAS_CHROMEOS select EXTERNAL_MRC_BLOB - select CACHE_ROM select MARK_GRAPHICS_MEM_WRCOMB select MONOTONIC_TIMER_MSR
diff --git a/src/mainboard/google/falco/Kconfig b/src/mainboard/google/falco/Kconfig index b372c47..893c4e5 100644 --- a/src/mainboard/google/falco/Kconfig +++ b/src/mainboard/google/falco/Kconfig @@ -18,7 +18,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy select HAVE_SMI_HANDLER select MAINBOARD_HAS_CHROMEOS select EXTERNAL_MRC_BLOB - select CACHE_ROM select MARK_GRAPHICS_MEM_WRCOMB select MONOTONIC_TIMER_MSR select DRIVERS_I2C_RTD2132 diff --git a/src/mainboard/google/peppy/Kconfig b/src/mainboard/google/peppy/Kconfig index 7a406e1..59fb8c0 100644 --- a/src/mainboard/google/peppy/Kconfig +++ b/src/mainboard/google/peppy/Kconfig @@ -18,7 +18,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy select HAVE_SMI_HANDLER select MAINBOARD_HAS_CHROMEOS select EXTERNAL_MRC_BLOB - select CACHE_ROM select MARK_GRAPHICS_MEM_WRCOMB select MONOTONIC_TIMER_MSR
diff --git a/src/mainboard/google/slippy/Kconfig b/src/mainboard/google/slippy/Kconfig index 065830a..3ffacde 100644 --- a/src/mainboard/google/slippy/Kconfig +++ b/src/mainboard/google/slippy/Kconfig @@ -18,7 +18,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy select HAVE_SMI_HANDLER select MAINBOARD_HAS_CHROMEOS select EXTERNAL_MRC_BLOB - select CACHE_ROM select MARK_GRAPHICS_MEM_WRCOMB select MONOTONIC_TIMER_MSR select MAINBOARD_HAS_NATIVE_VGA_INIT diff --git a/src/mainboard/intel/wtm2/Kconfig b/src/mainboard/intel/wtm2/Kconfig index 99ed53c..7ff66ed 100644 --- a/src/mainboard/intel/wtm2/Kconfig +++ b/src/mainboard/intel/wtm2/Kconfig @@ -13,7 +13,6 @@ config BOARD_SPECIFIC_OPTIONS # dummy select HAVE_ACPI_RESUME select HAVE_SMI_HANDLER select MAINBOARD_HAS_CHROMEOS - select CACHE_ROM select MARK_GRAPHICS_MEM_WRCOMB select MAINBOARD_HAS_NATIVE_VGA_INIT select MONOTONIC_TIMER_MSR diff --git a/src/northbridge/intel/fsp_sandybridge/Kconfig b/src/northbridge/intel/fsp_sandybridge/Kconfig index 0c3d5f5..ce366ef 100644 --- a/src/northbridge/intel/fsp_sandybridge/Kconfig +++ b/src/northbridge/intel/fsp_sandybridge/Kconfig @@ -87,14 +87,10 @@ config CBFS_SIZE config ENABLE_FAST_BOOT bool "Enable Fast Boot" default y if CPU_INTEL_FSP_MODEL_306AX && SOUTHBRIDGE_INTEL_FSP_BD82X6X - depends on !CACHE_ROM help Enabling this feature will cause MRC data to be cached in NV storage which will speed up boot time on future reboots and/or power cycles.
- WARNING: This feature combined with the CACHE_ROM may result in undefined - behavior. - config MRC_CACHE_SIZE hex "MRC Data Cache Size" default 0x10000 diff --git a/src/soc/intel/baytrail/Kconfig b/src/soc/intel/baytrail/Kconfig index 613593e..d3311ef 100644 --- a/src/soc/intel/baytrail/Kconfig +++ b/src/soc/intel/baytrail/Kconfig @@ -9,7 +9,6 @@ if SOC_INTEL_BAYTRAIL config CPU_SPECIFIC_OPTIONS def_bool y select CACHE_MRC_SETTINGS - select CACHE_ROM select CAR_MIGRATION select COLLECT_TIMESTAMPS select CPU_MICROCODE_IN_CBFS