diff options
| author | Alexandre Ghiti <alexghiti@rivosinc.com> | 2023-03-24 16:54:19 +0100 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-04-18 20:43:02 -0700 |
| commit | a7407a1318a9d7b5a7de7ab19935de5fc4c47a57 (patch) | |
| tree | 886921cb4fac1bbdbedd5bb535c3a6084e1313c3 /arch/riscv/include/asm/page.h | |
| parent | fe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff) | |
riscv: Get rid of riscv_pfn_base variable
Use directly phys_ram_base instead, riscv_pfn_base is just the pfn of
the address contained in phys_ram_base.
Even if there is no functional change intended in this patch, actually
setting phys_ram_base that early changes the behaviour of
kernel_mapping_pa_to_va during the early boot: phys_ram_base used to be
zero before this patch and now it is set to the physical start address of
the kernel. But it does not break the conversion of a kernel physical
address into a virtual address since kernel_mapping_pa_to_va should only
be used on kernel physical addresses, i.e. addresses greater than the
physical start address of the kernel.
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Tested-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20230324155421.271544-2-alexghiti@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include/asm/page.h')
| -rw-r--r-- | arch/riscv/include/asm/page.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index 7fed7c431928..8dc686f549b6 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -91,8 +91,7 @@ typedef struct page *pgtable_t; #endif #ifdef CONFIG_MMU -extern unsigned long riscv_pfn_base; -#define ARCH_PFN_OFFSET (riscv_pfn_base) +#define ARCH_PFN_OFFSET (PFN_DOWN((unsigned long)phys_ram_base)) #else #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) #endif /* CONFIG_MMU */ |