diff options
| author | Daisuke Nojiri <dnojiri@chromium.org> | 2014-03-05 15:46:28 -0800 |
|---|---|---|
| committer | Marc Jones <marc.jones@se-eng.com> | 2014-12-09 18:39:34 +0100 |
| commit | 0341169761790411208a6644b417f4ae7d1bd88a (patch) | |
| tree | 678c3b0d57d704b00fab3b769e6d423c626a9a6d /payloads/libpayload/include/arm | |
| parent | 97345dbc6c2f031158f249b3dda89200784b86b4 (diff) | |
ARM: API to Map Physical Address to Wipe Memory above 4GB
TEST=Booted nyan in normal and recovery mode. Created a map, filled it with some
chars, then verified they can be read from the pointer returned.
BUG=chrome-os-partner:25587
BRANCH=None
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Change-Id: Id1f1be4f6d2d5734d87bf3452d4806d0fe3fda88
Original-Reviewed-on: https://chromium-review.googlesource.com/188894
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Queue: Daisuke Nojiri <dnojiri@chromium.org>
Original-Tested-by: Daisuke Nojiri <dnojiri@chromium.org>
(cherry picked from commit 7fda3885f51c8d383585a80e99ab3df9c789d872)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Change-Id: I6255d11396c87f40b0ae12ceab0fd152f2478529
Reviewed-on: http://review.coreboot.org/7658
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'payloads/libpayload/include/arm')
| -rw-r--r-- | payloads/libpayload/include/arm/arch/cache.h | 9 | ||||
| -rw-r--r-- | payloads/libpayload/include/arm/arch/virtual.h | 5 |
2 files changed, 14 insertions, 0 deletions
diff --git a/payloads/libpayload/include/arm/arch/cache.h b/payloads/libpayload/include/arm/arch/cache.h index 470eb55108..647ec42ca2 100644 --- a/payloads/libpayload/include/arm/arch/cache.h +++ b/payloads/libpayload/include/arm/arch/cache.h @@ -117,6 +117,15 @@ static inline void write_ttbr0(uint32_t val) asm volatile ("mcr p15, 0, %0, c2, c0, 0" : : "r" (val) : "memory"); } +/* read translation table base register 0 (TTBR0) */ +static inline uint64_t read_ttbr0(void) +{ + uint32_t low, high; + asm volatile ("mrrc p15, 0, %[low], %[high], c2" : + [low] "=r" (low), [high] "=r" (high)); + return ((uint64_t)high << 32) | low; +} + /* read translation table base control register (TTBCR) */ static inline uint32_t read_ttbcr(void) { diff --git a/payloads/libpayload/include/arm/arch/virtual.h b/payloads/libpayload/include/arm/arch/virtual.h index 328c3aa34e..e51530d252 100644 --- a/payloads/libpayload/include/arm/arch/virtual.h +++ b/payloads/libpayload/include/arm/arch/virtual.h @@ -30,6 +30,8 @@ #ifndef _ARCH_VIRTUAL_H #define _ARCH_VIRTUAL_H +#include <arch/cache.h> + extern unsigned long virtual_offset; #define virt_to_phys(virt) ((unsigned long) (virt) + virtual_offset) @@ -38,4 +40,7 @@ extern unsigned long virtual_offset; #define virt_to_bus(addr) virt_to_phys(addr) #define bus_to_virt(addr) phys_to_virt(addr) +void *lpae_map_phys_addr(unsigned long pa_mb, enum dcache_policy policy); +void lpae_restore_map(void); + #endif |