diff options
Diffstat (limited to 'src/soc/intel/common/block/fast_spi/fast_spi.c')
| -rw-r--r-- | src/soc/intel/common/block/fast_spi/fast_spi.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/fast_spi/fast_spi.c b/src/soc/intel/common/block/fast_spi/fast_spi.c index 24c667b845..d6e8f53ee4 100644 --- a/src/soc/intel/common/block/fast_spi/fast_spi.c +++ b/src/soc/intel/common/block/fast_spi/fast_spi.c @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-only */ +#include <arch/romstage.h> #include <device/mmio.h> #include <assert.h> #include <device/pci_def.h> @@ -212,6 +213,53 @@ size_t fast_spi_get_bios_region(size_t *bios_size) return bios_start; } +static bool fast_spi_ext_bios_cache_range(uintptr_t *base, size_t *size) +{ + uint32_t alignment; + if (!CONFIG(FAST_SPI_SUPPORTS_EXT_BIOS_WINDOW)) + return false; + + fast_spi_get_ext_bios_window(base, size); + + /* Enable extended bios only if Size of Bios region is greater than 16MiB */ + if (*size == 0 || *base == 0) + return false; + + /* Round to power of two */ + alignment = 1UL << (log2_ceil(*size)); + *size = ALIGN_UP(*size, alignment); + *base = ALIGN_DOWN(*base, *size); + + return true; +} + +static void fast_spi_cache_ext_bios_window(void) +{ + size_t ext_bios_size; + uintptr_t ext_bios_base; + const int type = MTRR_TYPE_WRPROT; + + if (!fast_spi_ext_bios_cache_range(&ext_bios_base, &ext_bios_size)) + return; + + int mtrr = get_free_var_mtrr(); + if (mtrr == -1) + return; + set_var_mtrr(mtrr, ext_bios_base, ext_bios_size, type); +} + +void fast_spi_cache_ext_bios_postcar(struct postcar_frame *pcf) +{ + size_t ext_bios_size; + uintptr_t ext_bios_base; + const int type = MTRR_TYPE_WRPROT; + + if (!fast_spi_ext_bios_cache_range(&ext_bios_base, &ext_bios_size)) + return; + + postcar_frame_add_mtrr(pcf, ext_bios_base, ext_bios_size, type); +} + void fast_spi_cache_bios_region(void) { size_t bios_size; @@ -245,6 +293,9 @@ void fast_spi_cache_bios_region(void) set_var_mtrr(mtrr, base, bios_size, type); } + + /* Check if caching is needed for extended bios region if supported */ + fast_spi_cache_ext_bios_window(); } /* |