diff options
| author | Mitsyanko Igor <i.mitsyanko@samsung.com> | 2012-08-13 11:04:06 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2012-08-13 11:04:06 +0100 |
| commit | a9c0183059d6a4e4d940cd86ac0f9402b0655d24 (patch) | |
| tree | 7873e8e6e021e4ac304eb4a143a3e0a11c2e416d /hw/sd.c | |
| parent | 01fd41ab3fb69971c24a69ed49cde96086d81278 (diff) | |
hw/sd.c: convert wp_groups in SDState to bitfield
Representing each group write protection flag with only one bit instead of int
variable significantly reduces memory consumption.
Signed-off-by: Igor Mitsyanko <i.mitsyanko@samsung.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/sd.c')
| -rw-r--r-- | hw/sd.c | 33 |
1 files changed, 19 insertions, 14 deletions
@@ -32,6 +32,7 @@ #include "hw.h" #include "block.h" #include "sd.h" +#include "bitmap.h" //#define DEBUG_SD 1 @@ -81,7 +82,7 @@ struct SDState { uint8_t sd_status[64]; uint32_t vhs; int wp_switch; - int *wp_groups; + unsigned long *wp_groups; uint64_t size; int blk_len; uint32_t erase_start; @@ -415,7 +416,7 @@ static void sd_reset(SDState *sd, BlockDriverState *bdrv) if (sd->wp_groups) g_free(sd->wp_groups); sd->wp_switch = bdrv ? bdrv_is_read_only(bdrv) : 0; - sd->wp_groups = (int *) g_malloc0(sizeof(int) * sect); + sd->wp_groups = bitmap_new(sect); memset(sd->function_group, 0, sizeof(int) * 6); sd->erase_start = 0; sd->erase_end = 0; @@ -484,9 +485,11 @@ static void sd_erase(SDState *sd) sd->erase_end = 0; sd->csd[14] |= 0x40; - for (i = start; i <= end; i ++) - if (sd->wp_groups[i]) + for (i = start; i <= end; i++) { + if (test_bit(i, sd->wp_groups)) { sd->card_status |= WP_ERASE_SKIP; + } + } } static uint32_t sd_wpbits(SDState *sd, uint64_t addr) @@ -496,9 +499,11 @@ static uint32_t sd_wpbits(SDState *sd, uint64_t addr) wpnum = addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT); - for (i = 0; i < 32; i ++, wpnum ++, addr += WPGROUP_SIZE) - if (addr < sd->size && sd->wp_groups[wpnum]) + for (i = 0; i < 32; i++, wpnum++, addr += WPGROUP_SIZE) { + if (addr < sd->size && test_bit(wpnum, sd->wp_groups)) { ret |= (1 << i); + } + } return ret; } @@ -536,8 +541,8 @@ static void sd_function_switch(SDState *sd, uint32_t arg) static inline int sd_wp_addr(SDState *sd, uint32_t addr) { - return sd->wp_groups[addr >> - (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)]; + return test_bit(addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT), + sd->wp_groups); } static void sd_lock_command(SDState *sd) @@ -560,8 +565,8 @@ static void sd_lock_command(SDState *sd) sd->card_status |= LOCK_UNLOCK_FAILED; return; } - memset(sd->wp_groups, 0, sizeof(int) * (sd->size >> - (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT))); + bitmap_zero(sd->wp_groups, + (sd->size >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)) + 1); sd->csd[14] &= ~0x10; sd->card_status &= ~CARD_IS_LOCKED; sd->pwd_len = 0; @@ -1007,8 +1012,8 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, } sd->state = sd_programming_state; - sd->wp_groups[addr >> (HWBLOCK_SHIFT + - SECTOR_SHIFT + WPGROUP_SHIFT)] = 1; + set_bit(addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT), + sd->wp_groups); /* Bzzzzzzztt .... Operation complete. */ sd->state = sd_transfer_state; return sd_r1b; @@ -1027,8 +1032,8 @@ static sd_rsp_type_t sd_normal_command(SDState *sd, } sd->state = sd_programming_state; - sd->wp_groups[addr >> (HWBLOCK_SHIFT + - SECTOR_SHIFT + WPGROUP_SHIFT)] = 0; + clear_bit(addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT), + sd->wp_groups); /* Bzzzzzzztt .... Operation complete. */ sd->state = sd_transfer_state; return sd_r1b; |