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authorCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>2014-03-05 00:16:16 +0000
committerCarl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>2014-03-05 00:16:16 +0000
commit43eac0394591a4f662d2793e8405226c3c69fdc4 (patch)
tree4c51123a51fc9f3810ea6d646fbd453fd647b6b7
parent309dd2c7c24b8656ca50be5ab0ca3dc74d9c5eda (diff)
downloadast2050-flashrom-43eac0394591a4f662d2793e8405226c3c69fdc4.zip
ast2050-flashrom-43eac0394591a4f662d2793e8405226c3c69fdc4.tar.gz
Clean up physmap, fix unaligned mapping problems
Convert all physmaps in dmi.c to use aligned readonly maps. Convert all physmaps in cbtable.c to use unaligned readonly maps. Make physunmap() a generic architecture-independent wrapper. Add physunmap_unaligned() to complement physmap*_unaligned(). Corresponding to flashrom svn r1765. Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net> Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
-rw-r--r--cbtable.c7
-rw-r--r--dmi.c2
-rw-r--r--physmap.c60
-rw-r--r--programmer.h3
4 files changed, 51 insertions, 21 deletions
diff --git a/cbtable.c b/cbtable.c
index e5bcb45..c100bbb 100644
--- a/cbtable.c
+++ b/cbtable.c
@@ -261,7 +261,7 @@ int cb_parse_table(const char **vendor, const char **model)
#else
start = 0x0;
#endif
- table_area = physmap_ro("low megabyte", start, BYTES_TO_MAP - start);
+ table_area = physmap_ro_unaligned("low megabyte", start, BYTES_TO_MAP - start);
if (ERROR_PTR == table_area) {
msg_perr("Failed getting access to coreboot low tables.\n");
return -1;
@@ -276,8 +276,9 @@ int cb_parse_table(const char **vendor, const char **model)
if (forward->tag == LB_TAG_FORWARD) {
start = forward->forward;
start &= ~(getpagesize() - 1);
- physunmap(table_area, BYTES_TO_MAP);
- table_area = physmap_ro("high tables", start, BYTES_TO_MAP);
+ physunmap_unaligned(table_area, BYTES_TO_MAP);
+ // FIXME: table_area is never unmapped below, nor is it unmapped above in the no-forward case
+ table_area = physmap_ro_unaligned("high tables", start, BYTES_TO_MAP);
if (ERROR_PTR == table_area) {
msg_perr("Failed getting access to coreboot high tables.\n");
return -1;
diff --git a/dmi.c b/dmi.c
index ef7ae2c..25a4957 100644
--- a/dmi.c
+++ b/dmi.c
@@ -153,7 +153,7 @@ static void dmi_table(uint32_t base, uint16_t len, uint16_t num)
{
int i = 0, j = 0;
- uint8_t *dmi_table_mem = physmap_round("DMI Table", base, len);
+ uint8_t *dmi_table_mem = physmap_ro("DMI Table", base, len);
if (dmi_table_mem == NULL) {
msg_perr("Unable to access DMI Table\n");
return;
diff --git a/physmap.c b/physmap.c
index 9638c78..ca5afd0 100644
--- a/physmap.c
+++ b/physmap.c
@@ -27,6 +27,7 @@
#include <string.h>
#include <errno.h>
#include "flash.h"
+#include "programmer.h"
#include "hwaccess.h"
#if !defined(__DJGPP__) && !defined(__LIBPAYLOAD__)
@@ -89,7 +90,7 @@ static void *sys_physmap(uintptr_t phys_addr, size_t len)
#define sys_physmap_rw_uncached sys_physmap
#define sys_physmap_ro_cached sys_physmap
-void physunmap(void *virt_addr, size_t len)
+void sys_physunmap_unaligned(void *virt_addr, size_t len)
{
__dpmi_meminfo mi;
@@ -118,7 +119,7 @@ void *sys_physmap(uintptr_t phys_addr, size_t len)
#define sys_physmap_rw_uncached sys_physmap
#define sys_physmap_ro_cached sys_physmap
-void physunmap(void *virt_addr, size_t len)
+void sys_physunmap_unaligned(void *virt_addr, size_t len)
{
}
#elif defined(__MACH__) && defined(__APPLE__)
@@ -139,7 +140,7 @@ static void *sys_physmap(uintptr_t phys_addr, size_t len)
#define sys_physmap_rw_uncached sys_physmap
#define sys_physmap_ro_cached sys_physmap
-void physunmap(void *virt_addr, size_t len)
+void sys_physunmap_unaligned(void *virt_addr, size_t len)
{
unmap_physical(virt_addr, len);
}
@@ -192,13 +193,8 @@ static void *sys_physmap_ro_cached(uintptr_t phys_addr, size_t len)
return MAP_FAILED == virt_addr ? ERROR_PTR : virt_addr;
}
-void physunmap(void *virt_addr, size_t len)
+void sys_physunmap_unaligned(void *virt_addr, size_t len)
{
- if (len == 0) {
- msg_pspew("Not unmapping zero size at %p\n", virt_addr);
- return;
- }
-
munmap(virt_addr, len);
}
#endif
@@ -242,7 +238,7 @@ static int undo_physmap(void *data)
return 1;
}
struct undo_physmap_data *d = data;
- physunmap(d->virt_addr, d->len);
+ physunmap_unaligned(d->virt_addr, d->len);
free(data);
return 0;
}
@@ -292,7 +288,7 @@ static void *physmap_common(const char *descr, uintptr_t phys_addr, size_t len,
struct undo_physmap_data *d = malloc(sizeof(struct undo_physmap_data));
if (d == NULL) {
msg_perr("%s: Out of memory!\n", __func__);
- physunmap(virt_addr, len);
+ physunmap_unaligned(virt_addr, len);
return ERROR_PTR;
}
@@ -300,7 +296,7 @@ static void *physmap_common(const char *descr, uintptr_t phys_addr, size_t len,
d->len = len;
if (register_shutdown(undo_physmap, d) != 0) {
msg_perr("%s: Could not register shutdown function!\n", __func__);
- physunmap(virt_addr, len);
+ physunmap_unaligned(virt_addr, len);
return ERROR_PTR;
}
}
@@ -308,9 +304,41 @@ static void *physmap_common(const char *descr, uintptr_t phys_addr, size_t len,
return virt_addr + offset;
}
+void physunmap_unaligned(void *virt_addr, size_t len)
+{
+ /* No need to check for zero size, such mappings would have yielded ERROR_PTR. */
+ if (virt_addr == ERROR_PTR) {
+ msg_perr("Trying to unmap a nonexisting mapping!\n"
+ "Please report a bug at flashrom@flashrom.org\n");
+ return;
+ }
+
+ sys_physunmap_unaligned(virt_addr, len);
+}
+
+void physunmap(void *virt_addr, size_t len)
+{
+ uintptr_t tmp;
+
+ /* No need to check for zero size, such mappings would have yielded ERROR_PTR. */
+ if (virt_addr == ERROR_PTR) {
+ msg_perr("Trying to unmap a nonexisting mapping!\n"
+ "Please report a bug at flashrom@flashrom.org\n");
+ return;
+ }
+ tmp = (uintptr_t)virt_addr;
+ /* We assume that the virtual address of a page-aligned physical address is page-aligned as well. By
+ * extension, rounding a virtual unaligned address as returned by physmap should yield the same offset
+ * between rounded and original virtual address as between rounded and original physical address.
+ */
+ round_to_page_boundaries(&tmp, &len);
+ virt_addr = (void *)tmp;
+ physunmap_unaligned(virt_addr, len);
+}
+
void *physmap(const char *descr, uintptr_t phys_addr, size_t len)
{
- return physmap_common(descr, phys_addr, len, PHYSM_RW, PHYSM_NOCLEANUP, PHYSM_EXACT);
+ return physmap_common(descr, phys_addr, len, PHYSM_RW, PHYSM_NOCLEANUP, PHYSM_ROUND);
}
void *rphysmap(const char *descr, uintptr_t phys_addr, size_t len)
@@ -318,12 +346,12 @@ void *rphysmap(const char *descr, uintptr_t phys_addr, size_t len)
return physmap_common(descr, phys_addr, len, PHYSM_RW, PHYSM_CLEANUP, PHYSM_ROUND);
}
-void *physmap_round(const char *descr, uintptr_t phys_addr, size_t len)
+void *physmap_ro(const char *descr, uintptr_t phys_addr, size_t len)
{
- return physmap_common(descr, phys_addr, len, PHYSM_RW, PHYSM_NOCLEANUP, PHYSM_ROUND);
+ return physmap_common(descr, phys_addr, len, PHYSM_RO, PHYSM_NOCLEANUP, PHYSM_ROUND);
}
-void *physmap_ro(const char *descr, uintptr_t phys_addr, size_t len)
+void *physmap_ro_unaligned(const char *descr, uintptr_t phys_addr, size_t len)
{
return physmap_common(descr, phys_addr, len, PHYSM_RO, PHYSM_NOCLEANUP, PHYSM_EXACT);
}
diff --git a/programmer.h b/programmer.h
index 0c51f58..d4d1f90 100644
--- a/programmer.h
+++ b/programmer.h
@@ -277,9 +277,10 @@ int processor_flash_enable(void);
/* physmap.c */
void *physmap(const char *descr, uintptr_t phys_addr, size_t len);
void *rphysmap(const char *descr, uintptr_t phys_addr, size_t len);
-void *physmap_round(const char *descr, uintptr_t phys_addr, size_t len);
void *physmap_ro(const char *descr, uintptr_t phys_addr, size_t len);
+void *physmap_ro_unaligned(const char *descr, uintptr_t phys_addr, size_t len);
void physunmap(void *virt_addr, size_t len);
+void physunmap_unaligned(void *virt_addr, size_t len);
#if CONFIG_INTERNAL == 1
int setup_cpu_msr(int cpu);
void cleanup_cpu_msr(void);
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