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Further cleanup to MIPS target read/write memory function: 

- Move the mips32_..._read_mem calls to top-level of read_mem function.
- Change: Only perform mips_m4k_read_mem conversion when retval == ERROR_OK.  
   - Prevents pointless conversions of bogus read values after failures.
- Eliminate retval variable from mips_m4k_write_mem; return directly.
- Move declaration of retval variable to point of first use.
- Remove the now redundant switch statements testing size:
  - argument sanitizing already covers these cases.


git-svn-id: svn://svn.berlios.de/openocd/trunk@2220 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
zwelch 2009-06-12 04:14:28 +00:00
parent c6e80f63a3
commit 7fdce0e8bc
1 changed files with 13 additions and 38 deletions
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51
src/target/mips_m4k.c
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@ -732,7 +732,6 @@ int mips_m4k_read_memory(struct target_s *target, u32 address, u32 size, u32 cou
{
mips32_common_t *mips32 = target->arch_info;
mips_ejtag_t *ejtag_info = &mips32->ejtag_info;
int retval;
LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
@ -749,22 +748,14 @@ int mips_m4k_read_memory(struct target_s *target, u32 address, u32 size, u32 cou
if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
return ERROR_TARGET_UNALIGNED_ACCESS;
switch (size)
{
case 4:
case 2:
case 1:
/* if noDMA off, use DMAACC mode for memory read */
if(ejtag_info->impcode & EJTAG_IMP_NODMA)
retval = mips32_pracc_read_mem(ejtag_info, address, size, count, (void *)buffer);
else
retval = mips32_dmaacc_read_mem(ejtag_info, address, size, count, (void *)buffer);
break;
default:
LOG_ERROR("BUG: we shouldn't get here");
exit(-1);
break;
}
/* if noDMA off, use DMAACC mode for memory read */
int retval;
if(ejtag_info->impcode & EJTAG_IMP_NODMA)
retval = mips32_pracc_read_mem(ejtag_info, address, size, count, (void *)buffer);
else
retval = mips32_dmaacc_read_mem(ejtag_info, address, size, count, (void *)buffer);
if (ERROR_OK != retval)
return retval;
/* TAP data register is loaded LSB first (little endian) */
if (target->endianness == TARGET_BIG_ENDIAN)
@ -787,15 +778,14 @@ int mips_m4k_read_memory(struct target_s *target, u32 address, u32 size, u32 cou
}
}
}
return retval;
return ERROR_OK;
}
int mips_m4k_write_memory(struct target_s *target, u32 address, u32 size, u32 count, u8 *buffer)
{
mips32_common_t *mips32 = target->arch_info;
mips_ejtag_t *ejtag_info = &mips32->ejtag_info;
int retval;
LOG_DEBUG("address: 0x%8.8x, size: 0x%8.8x, count: 0x%8.8x", address, size, count);
@ -812,19 +802,6 @@ int mips_m4k_write_memory(struct target_s *target, u32 address, u32 size, u32 co
if (((size == 4) && (address & 0x3u)) || ((size == 2) && (address & 0x1u)))
return ERROR_TARGET_UNALIGNED_ACCESS;
switch (size)
{
case 4:
case 2:
case 1:
/* if noDMA off, use DMAACC mode for memory write */
break;
default:
LOG_ERROR("BUG: we shouldn't get here");
exit(-1);
break;
}
/* TAP data register is loaded LSB first (little endian) */
if (target->endianness == TARGET_BIG_ENDIAN)
{
@ -847,13 +824,11 @@ int mips_m4k_write_memory(struct target_s *target, u32 address, u32 size, u32 co
}
}
/* if noDMA off, use DMAACC mode for memory write */
if(ejtag_info->impcode & EJTAG_IMP_NODMA)
retval = mips32_pracc_write_mem(ejtag_info, address, size, count, (void *)buffer);
return mips32_pracc_write_mem(ejtag_info, address, size, count, (void *)buffer);
else
retval = mips32_dmaacc_write_mem(ejtag_info, address, size, count, (void *)buffer);
return retval;
return mips32_dmaacc_write_mem(ejtag_info, address, size, count, (void *)buffer);
}
int mips_m4k_register_commands(struct command_context_s *cmd_ctx)