diff options
| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2019-06-17 17:07:49 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-07-04 09:00:40 +0200 |
| commit | e30dc333268cbbcd2e5bd49e97959af90da16d20 (patch) | |
| tree | 3b2f8fa078f724d275a06ed98960ad988a60b74d /arch/arm/include | |
| parent | 6d25cbb988bc431d0fe6aa12f8f6883b89d27958 (diff) | |
| download | barebox-e30dc333268cbbcd2e5bd49e97959af90da16d20.tar.gz barebox-e30dc333268cbbcd2e5bd49e97959af90da16d20.tar.xz | |
ARM: sm: move get_gicd_base_address to header for reuse
Incoming PSCI implementation for the STM32MP1 needs
to get_gicd_base_address as well, so move it to gic.h to
avoid code duplication.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/gic.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/arm/include/asm/gic.h b/arch/arm/include/asm/gic.h index bd3a80cdf7..f83f528141 100644 --- a/arch/arm/include/asm/gic.h +++ b/arch/arm/include/asm/gic.h @@ -107,4 +107,33 @@ #define ICC_SGI1R_EL1 S3_0_C12_C11_5 #define ICC_ASGI1R_EL1 S3_0_C12_C11_6 +#ifndef __ASSEMBLY__ +/* valid bits in CBAR register / PERIPHBASE value */ +#define CBAR_MASK 0xFFFF8000 + +static inline unsigned long get_cbar(void) +{ + unsigned periphbase; + + /* get the GIC base address from the CBAR register */ + asm("mrc p15, 4, %0, c15, c0, 0\n" : "=r" (periphbase)); + + /* the PERIPHBASE can be mapped above 4 GB (lower 8 bits used to + * encode this). Bail out here since we cannot access this without + * enabling paging. + */ + if ((periphbase & 0xff) != 0) { + pr_err("PERIPHBASE is above 4 GB, no access.\n"); + return -1; + } + + return periphbase & CBAR_MASK; +} + +static inline unsigned long get_gicd_base_address(void) +{ + return get_cbar() + GIC_DIST_OFFSET; +} +#endif + #endif /* __GIC_H__ */ |