diff options
| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2023-05-22 07:28:26 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2023-05-23 09:26:07 +0200 |
| commit | f0042d462f3df4d106d08ca138d340e123b10946 (patch) | |
| tree | be1834023e70e8da8bdafb1598a55f9b744ba017 /arch/powerpc | |
| parent | 9845563450b88c77710c8b7e19d98b140cb542c4 (diff) | |
| download | barebox-f0042d462f3df4d106d08ca138d340e123b10946.tar.gz barebox-f0042d462f3df4d106d08ca138d340e123b10946.tar.xz | |
mmu: add physical address parameter to arch_remap_range
ARM32 has map_io_sections for non-1:1 remapping, but it's limited to 1M
sections. arch_remap_range has newly gained support for 4K granularity
remapping, but supports only changing attributes and no non-1:1
remapping yet. In preparation for adding this missing feature, adjust
the prototype.
No functional change.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20230522052835.1039143-3-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/cpu-85xx/mmu.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 2 |
2 files changed, 6 insertions, 3 deletions
diff --git a/arch/powerpc/cpu-85xx/mmu.c b/arch/powerpc/cpu-85xx/mmu.c index 6b93c3e8db..b484acbf80 100644 --- a/arch/powerpc/cpu-85xx/mmu.c +++ b/arch/powerpc/cpu-85xx/mmu.c @@ -17,13 +17,16 @@ #include <mmu.h> #include <mach/mmu.h> -int arch_remap_range(void *_start, size_t size, unsigned flags) +int arch_remap_range(void *virt_addr, phys_addr_t phys_addr, size_t size, unsigned flags) { uint32_t ptr, start, tsize, valid, wimge, pte_flags; unsigned long epn; phys_addr_t rpn = 0; int esel = 0; + if (phys_addr != virt_to_phys(virt_addr)) + return -ENOSYS; + switch (flags) { case MAP_UNCACHED: pte_flags = MAS2_I; @@ -35,7 +38,7 @@ int arch_remap_range(void *_start, size_t size, unsigned flags) return -EINVAL; } - ptr = start = (uint32_t)_start; + ptr = start = (uint32_t)virt_addr; wimge = pte_flags | MAS2_M; while (ptr < (start + size)) { diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 81a5d7d55f..10b15a47b9 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -563,7 +563,7 @@ extern int write_bat(ppc_bat_t bat, unsigned long upper, unsigned long lower); #ifdef CONFIG_MMU #define ARCH_HAS_REMAP -int arch_remap_range(void *_start, size_t size, unsigned flags); +int arch_remap_range(void *virt_addr, phys_addr_t phys_addr, size_t size, unsigned flags); #endif #endif |