diff options
Diffstat (limited to 'src/target/arm_adi_v5.c')
| -rw-r--r-- | src/target/arm_adi_v5.c | 36 |
1 files changed, 24 insertions, 12 deletions
diff --git a/src/target/arm_adi_v5.c b/src/target/arm_adi_v5.c index 251f2581..60951852 100644 --- a/src/target/arm_adi_v5.c +++ b/src/target/arm_adi_v5.c @@ -52,6 +52,18 @@ * are immediatley available. */ + +/* ARM ADI Specification requires at least 10 bits used for TAR autoincrement */ + +/* + u32 tar_block_size(u32 address) + Return the largest block starting at address that does not cross a tar block size alignment boundary +*/ +static u32 max_tar_block_size(u32 tar_autoincr_block, u32 address) +{ + return (tar_autoincr_block - ((tar_autoincr_block - 1) & address)) >> 2; +} + /*************************************************************************** * * * DPACC and APACC scanchain access through JTAG-DP * @@ -467,8 +479,8 @@ int mem_ap_write_buf_u32(swjdp_common_t *swjdp, u8 *buffer, int count, u32 addre while (wcount > 0) { - /* Adjust to write blocks within 4K aligned boundaries */ - blocksize = (0x1000 - (0xFFF & address)) >> 2; + /* Adjust to write blocks within boundaries aligned to the TAR autoincremnent size*/ + blocksize = max_tar_block_size(swjdp->tar_autoincr_block, address); if (wcount < blocksize) blocksize = wcount; @@ -517,8 +529,8 @@ int mem_ap_write_buf_packed_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u3 { int nbytes; - /* Adjust to read within 4K block boundaries */ - blocksize = (0x1000 - (0xFFF & address)) >> 1; + /* Adjust to write blocks within boundaries aligned to the TAR autoincremnent size*/ + blocksize = max_tar_block_size(swjdp->tar_autoincr_block, address); if (wcount < blocksize) blocksize = wcount; @@ -613,8 +625,8 @@ int mem_ap_write_buf_packed_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 { int nbytes; - /* Adjust to read within 4K block boundaries */ - blocksize = (0x1000 - (0xFFF & address)); + /* Adjust to write blocks within boundaries aligned to the TAR autoincremnent size*/ + blocksize = max_tar_block_size(swjdp->tar_autoincr_block, address); if (wcount < blocksize) blocksize = wcount; @@ -710,8 +722,8 @@ int mem_ap_read_buf_u32(swjdp_common_t *swjdp, u8 *buffer, int count, u32 addres while (wcount > 0) { - /* Adjust to read within 4K block boundaries */ - blocksize = (0x1000 - (0xFFF & address)) >> 2; + /* Adjust to read blocks within boundaries aligned to the TAR autoincremnent size*/ + blocksize = max_tar_block_size(swjdp->tar_autoincr_block, address); if (wcount < blocksize) blocksize = wcount; @@ -784,8 +796,8 @@ int mem_ap_read_buf_packed_u16(swjdp_common_t *swjdp, u8 *buffer, int count, u32 { int nbytes; - /* Adjust to read within 4K block boundaries */ - blocksize = (0x1000 - (0xFFF & address)) >> 1; + /* Adjust to read blocks within boundaries aligned to the TAR autoincremnent size*/ + blocksize = max_tar_block_size(swjdp->tar_autoincr_block, address); if (wcount < blocksize) blocksize = wcount; @@ -879,8 +891,8 @@ int mem_ap_read_buf_packed_u8(swjdp_common_t *swjdp, u8 *buffer, int count, u32 { int nbytes; - /* Adjust to read within 4K block boundaries */ - blocksize = (0x1000 - (0xFFF & address)); + /* Adjust to read blocks within boundaries aligned to the TAR autoincremnent size*/ + blocksize = max_tar_block_size(swjdp->tar_autoincr_block, address); if (wcount < blocksize) blocksize = wcount; |