diff options
| -rw-r--r-- | payloads/libpayload/arch/arm64/mmu.c | 49 | ||||
| -rw-r--r-- | payloads/libpayload/include/arm64/arch/mmu.h | 2 |
2 files changed, 51 insertions, 0 deletions
diff --git a/payloads/libpayload/arch/arm64/mmu.c b/payloads/libpayload/arch/arm64/mmu.c index b69dac26d0..41fb10b54d 100644 --- a/payloads/libpayload/arch/arm64/mmu.c +++ b/payloads/libpayload/arch/arm64/mmu.c @@ -616,6 +616,25 @@ static struct mmu_memrange *mmu_add_dma_range(struct mmu_ranges *mmu_ranges) return mmu_alloc_range(mmu_ranges, &prop); } +static struct mmu_memrange *_mmu_add_fb_range( + uint32_t size, + struct mmu_ranges *mmu_ranges) +{ + struct mmu_new_range_prop prop; + + prop.type = TYPE_DMA_MEM; + + /* make sure to allocate a size of multiple of GRANULE_SIZE */ + size = ALIGN_UP(size, GRANULE_SIZE); + prop.size = size; + prop.lim_excl = MIN_64_BIT_ADDR; + prop.align = MB_SIZE; + prop.is_valid_range = NULL; + prop.src_type = TYPE_NORMAL_MEM; + + return mmu_alloc_range(mmu_ranges, &prop); +} + /* * Func: mmu_extract_ranges * Desc: Assumption is that coreboot tables have memranges in sorted @@ -653,6 +672,33 @@ static void mmu_extract_ranges(struct memrange *cb_ranges, } } +static void mmu_add_fb_range(struct mmu_ranges *mmu_ranges) +{ + struct mmu_memrange *fb_range; + struct cb_framebuffer *framebuffer = lib_sysinfo.framebuffer; + uint32_t fb_size; + + /* + * Check whether framebuffer is needed + * or framebuffer address has been set already + */ + if (framebuffer == NULL) + return; + if (framebuffer->physical_address) + return; + fb_size = framebuffer->bytes_per_line * framebuffer->y_resolution; + if (!fb_size) + return; + + /* Allocate framebuffer */ + fb_range = _mmu_add_fb_range(fb_size, mmu_ranges); + if (fb_range == NULL) + mmu_error(); + + /* Set framebuffer address */ + framebuffer->physical_address = fb_range->base; +} + /* * Func: mmu_init_ranges * Desc: Initialize mmu_memranges based on the memranges obtained from coreboot @@ -673,6 +719,9 @@ struct mmu_memrange *mmu_init_ranges_from_sysinfo(struct memrange *cb_ranges, /* Get a range for dma */ dma_range = mmu_add_dma_range(mmu_ranges); + /* Get a range for framebuffer */ + mmu_add_fb_range(mmu_ranges); + if (dma_range == NULL) mmu_error(); diff --git a/payloads/libpayload/include/arm64/arch/mmu.h b/payloads/libpayload/include/arm64/arch/mmu.h index fdb1cc86d1..abd29f5ad4 100644 --- a/payloads/libpayload/include/arm64/arch/mmu.h +++ b/payloads/libpayload/include/arm64/arch/mmu.h @@ -181,6 +181,8 @@ extern char _start[], _end[]; #define DMA_DEFAULT_SIZE (0x20 * GRANULE_SIZE) #define TTB_DEFAULT_SIZE 0x100000 +#define MB_SIZE (1UL << 20) + /* Initialize the MMU TTB tables using the mmu_ranges */ uint64_t mmu_init(struct mmu_ranges *mmu_ranges); |