openwrt/flashrom
1
0
Fork 0
mirror of https://review.coreboot.org/flashrom.git synced 2025-07-02 22:43:17 +02:00
Code Issues Releases Wiki Activity

Create a physical memory mapping function which requests cached readonly memory

Browse Source 
This should take care of picky Linux kernels which do not allow uncached
mappings to cached areas. Handle mapping failure gracefully (no forced
exit()) if the caller specifies it.

Such cached areas which can handle mapping failure are DMI tables and
coreboot tables. On failure we just ignore those tables. That is not
perfect, but a lot better than aborting flashrom due to an error in
nonessential functionality.

This should fix flashrom on a sizable number of machines where it
currently aborts early.

Yes, I could have exploited a Linux kernel bug to "solve" this, but
relying on such bugs is not exactly the best idea.

Corresponding to flashrom svn r889.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Vincent Pelletier <plr.vincent@gmail.com>
This commit is contained in:
Carl-Daniel Hailfinger
2010-02-02 11:09:03 +00:00
parent ba7c9228d3
commit baaffe0831
3 changed files with 65 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
flash.h
View File

@ -343,6 +343,7 @@ int chipset_flash_enable(void);
/* physmap.c */
void *physmap(const char *descr, unsigned long phys_addr, size_t len);
void *physmap_try_ro(const char *descr, unsigned long phys_addr, size_t len);
void physunmap(void *virt_addr, size_t len);
int setup_cpu_msr(int cpu);
void cleanup_cpu_msr(void);