diff options
Diffstat (limited to 'serprog.c')
-rw-r--r-- | serprog.c | 16 |
1 files changed, 16 insertions, 0 deletions
@@ -943,3 +943,19 @@ static int serprog_spi_read(struct flashctx *flash, uint8_t *buf, } return 0; } + +void *serprog_map(const char *descr, uintptr_t phys_addr, size_t len) +{ + /* Serprog transmits 24 bits only and assumes the underlying implementation handles any remaining bits + * correctly (usually setting them to one either in software (for FWH/LPC) or relying on the fact that + * the hardware observes a subset of the address bits only). Combined with the standard mapping of + * flashrom this creates a 16 MB-wide window just below the 4 GB boundary where serprog can operate (as + * needed for non-SPI chips). Below we make sure that the requested range is within this window. */ + if ((phys_addr & 0xFF000000) == 0xFF000000) { + return (void*)phys_addr; + } else { + msg_pwarn(MSGHEADER "requested mapping %s is incompatible: 0x%zx bytes at 0x%0*" PRIxPTR ".\n", + descr, len, PRIxPTR_WIDTH, phys_addr); + return NULL; + } +} |