diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/aubdump.c | 96 |
1 files changed, 95 insertions, 1 deletions
diff --git a/tools/aubdump.c b/tools/aubdump.c index ed181a50..fbd8bf8f 100644 --- a/tools/aubdump.c +++ b/tools/aubdump.c @@ -383,7 +383,7 @@ register_write_out(uint32_t addr, uint32_t value) } static void -gen8_map_ggtt_range(uint64_t start, uint64_t end) +gen8_emit_ggtt_pte_for_range(uint64_t start, uint64_t end) { uint64_t entry_addr; uint64_t page_num; @@ -410,6 +410,100 @@ gen8_map_ggtt_range(uint64_t start, uint64_t end) } while (entry_addr < end); } +/** + * Sets bits `start` through `end` - 1 in the bitmap array. + */ +static void +set_bitmap_range(uint32_t *bitmap, uint32_t start, uint32_t end) +{ + uint32_t pos = start; + while (pos < end) { + const uint32_t bit = 1 << (pos & 0x1f); + if (bit == 1 && (end - pos) > 32) { + bitmap[pos >> 5] = 0xffffffff; + pos += 32; + } else { + bitmap[pos >> 5] |= bit; + pos++; + } + } +} + +/** + * Finds the next `set` (or clear) bit in the bitmap array. + * + * The search starts at `*start` and only checks until `end` - 1. + * + * If found, returns true, and the found bit index in `*start`. + */ +static bool +find_bitmap_bit(uint32_t *bitmap, bool set, uint32_t *start, uint32_t end) +{ + uint32_t pos = *start; + const uint32_t neg_dw = set ? 0 : -1; + while (pos < end) { + const uint32_t dw = bitmap[pos >> 5]; + const uint32_t bit = 1 << (pos & 0x1f); + if (!!(dw & bit) == set) { + *start = pos; + return true; + } else if (bit == 1 && dw == neg_dw) + pos += 32; + else + pos++; + } + return false; +} + +/** + * Finds a range of clear bits within the bitmap array. + * + * The search starts at `*start` and only checks until `*end` - 1. + * + * If found, returns true, and `*start` and `*end` are set for the + * range of clear bits. + */ +static bool +find_bitmap_clear_bit_range(uint32_t *bitmap, uint32_t *start, uint32_t *end) +{ + if (find_bitmap_bit(bitmap, false, start, *end)) { + uint32_t found_end = *start; + if (find_bitmap_bit(bitmap, true, &found_end, *end)) + *end = found_end; + return true; + } + return false; +} + +static void +gen8_map_ggtt_range(uint64_t start, uint64_t end) +{ + uint32_t pos1, pos2, end_pos; + static uint32_t *bitmap = NULL; + if (bitmap == NULL) { + /* 4GiB (32-bits) of 4KiB pages (12-bits) in dwords (5-bits) */ + bitmap = calloc(1 << (32 - 12 - 5), sizeof(*bitmap)); + if (bitmap == NULL) + return; + } + + pos1 = start >> 12; + end_pos = (end + 4096 - 1) >> 12; + while (pos1 < end_pos) { + pos2 = end_pos; + if (!find_bitmap_clear_bit_range(bitmap, &pos1, &pos2)) + break; + + if (verbose) + printf("MAPPING 0x%08lx-0x%08lx\n", + (uint64_t)pos1 << 12, (uint64_t)pos2 << 12); + gen8_emit_ggtt_pte_for_range((uint64_t)pos1 << 12, + (uint64_t)pos2 << 12); + set_bitmap_range(bitmap, (uint64_t)pos1, (uint64_t)pos2); + pos1 = pos2; + } +} + static void gen10_write_header(void) { |