diff options
| author | Weijie Gao <[email protected]> | 2022-05-20 11:21:51 +0800 |
|---|---|---|
| committer | Daniel Schwierzeck <[email protected]> | 2022-07-13 23:03:37 +0200 |
| commit | 2948d9cf8637e49e2a172b8936a9f5a3a04bca13 (patch) | |
| tree | 97fbd9e601648c5cb162a9545e7c29fd99e73d61 /arch/mips/include | |
| parent | 9a3bbb0eba51cc6abd11354a52fdff709756a7c2 (diff) | |
mips: add support for noncached_alloc()
This patch adds support for noncached_alloc() which was only supported by
ARM platform.
Unlike the ARM platform, MMU is not used in u-boot for MIPS. Instead, KSEG
is provided to access uncached memory. So most code of this patch is copied
from cache.c of ARM platform, with only two differences:
1. MMU is untouched in noncached_set_region()
2. Address returned by noncached_alloc() is converted using KSEG1ADDR()
Reviewed-by: Daniel Schwierzeck <[email protected]>
Signed-off-by: Weijie Gao <[email protected]>
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/system.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h index 79e638844b2..89a2ac209fc 100644 --- a/arch/mips/include/asm/system.h +++ b/arch/mips/include/asm/system.h @@ -282,4 +282,24 @@ static inline void instruction_hazard_barrier(void) : "=&r"(tmp)); } +#ifdef CONFIG_SYS_NONCACHED_MEMORY +/* 1MB granularity */ +#define MMU_SECTION_SHIFT 20 +#define MMU_SECTION_SIZE (1 << MMU_SECTION_SHIFT) + +/** + * noncached_init() - Initialize non-cached memory region + * + * Initialize non-cached memory area. This memory region will be typically + * located right below the malloc() area and be accessed from KSEG1. + * + * It is called during the generic post-relocation init sequence. + * + * Return: 0 if OK + */ +int noncached_init(void); + +phys_addr_t noncached_alloc(size_t size, size_t align); +#endif /* CONFIG_SYS_NONCACHED_MEMORY */ + #endif /* _ASM_SYSTEM_H */ |