diff options
Diffstat (limited to 'physmap.c')
| -rw-r--r-- | physmap.c | 23 |
1 files changed, 14 insertions, 9 deletions
@@ -52,11 +52,11 @@ static void *map_first_meg(unsigned long phys_addr, size_t len) realmem_map = valloc(1024 * 1024); if (!realmem_map) { - return NULL; + return ERROR_PTR; } if (__djgpp_map_physical_memory(realmem_map, (1024 * 1024), 0)) { - return NULL; + return ERROR_PTR; } return realmem_map + phys_addr; @@ -69,7 +69,7 @@ static void *sys_physmap(unsigned long phys_addr, size_t len) /* enable 4GB limit on DS descriptor */ if (!__djgpp_nearptr_enable()) { - return NULL; + return ERROR_PTR; } if ((phys_addr + len - 1) < (1024 * 1024)) { @@ -82,7 +82,7 @@ static void *sys_physmap(unsigned long phys_addr, size_t len) ret = __dpmi_physical_address_mapping (&mi); if (ret != 0) { - return NULL; + return ERROR_PTR; } return (void *) mi.address + __djgpp_conventional_base; @@ -112,7 +112,12 @@ void physunmap(void *virt_addr, size_t len) static void *sys_physmap(unsigned long phys_addr, size_t len) { - return map_physical(phys_addr, len); + /* The short form of ?: is a GNU extension. + * FIXME: map_physical returns NULL both for errors and for success + * if the region is mapped at virtual address zero. If in doubt, report + * an error until a better interface exists. + */ + return map_physical(phys_addr, len) ? : ERROR_PTR; } /* The OS X driver does not differentiate between mapping types. */ @@ -151,7 +156,7 @@ static void *sys_physmap_rw_uncached(unsigned long phys_addr, size_t len) virt_addr = mmap(0, len, PROT_WRITE | PROT_READ, MAP_SHARED, fd_mem, (off_t)phys_addr); - return MAP_FAILED == virt_addr ? NULL : virt_addr; + return MAP_FAILED == virt_addr ? ERROR_PTR : virt_addr; } /* For reading DMI/coreboot/whatever tables. We should never write, and we @@ -171,7 +176,7 @@ static void *sys_physmap_ro_cached(unsigned long phys_addr, size_t len) virt_addr = mmap(0, len, PROT_READ, MAP_SHARED, fd_mem_cached, (off_t)phys_addr); - return MAP_FAILED == virt_addr ? NULL : virt_addr; + return MAP_FAILED == virt_addr ? ERROR_PTR : virt_addr; } void physunmap(void *virt_addr, size_t len) @@ -197,7 +202,7 @@ static void *physmap_common(const char *descr, unsigned long phys_addr, size_t l if (len == 0) { msg_pspew("Not mapping %s, zero size at 0x%08lx.\n", descr, phys_addr); - return NULL; + return ERROR_PTR; } if ((getpagesize() - 1) & len) { @@ -216,7 +221,7 @@ static void *physmap_common(const char *descr, unsigned long phys_addr, size_t l virt_addr = sys_physmap_rw_uncached(phys_addr, len); } - if (NULL == virt_addr) { + if (ERROR_PTR == virt_addr) { if (NULL == descr) descr = "memory"; msg_perr("Error accessing %s, 0x%lx bytes at 0x%08lx\n", descr, (unsigned long)len, phys_addr); |
