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Diffstat (limited to 'arch/riscv/mm/init.c')
-rw-r--r--arch/riscv/mm/init.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index a14bf3910eec..88134cc288d9 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -36,6 +36,9 @@ EXPORT_SYMBOL(kernel_map);
#define kernel_map (*(struct kernel_mapping *)XIP_FIXUP(&kernel_map))
#endif
+phys_addr_t phys_ram_base __ro_after_init;
+EXPORT_SYMBOL(phys_ram_base);
+
#ifdef CONFIG_XIP_KERNEL
extern char _xiprom[], _exiprom[];
#endif
@@ -160,7 +163,7 @@ static void __init setup_bootmem(void)
phys_addr_t vmlinux_end = __pa_symbol(&_end);
phys_addr_t vmlinux_start = __pa_symbol(&_start);
phys_addr_t __maybe_unused max_mapped_addr;
- phys_addr_t dram_end;
+ phys_addr_t phys_ram_end;
#ifdef CONFIG_XIP_KERNEL
vmlinux_start = __pa_symbol(&_sdata);
@@ -181,9 +184,12 @@ static void __init setup_bootmem(void)
#endif
memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start);
- dram_end = memblock_end_of_DRAM();
+ phys_ram_end = memblock_end_of_DRAM();
#ifndef CONFIG_64BIT
+#ifndef CONFIG_XIP_KERNEL
+ phys_ram_base = memblock_start_of_DRAM();
+#endif
/*
* memblock allocator is not aware of the fact that last 4K bytes of
* the addressable memory can not be mapped because of IS_ERR_VALUE
@@ -194,12 +200,12 @@ static void __init setup_bootmem(void)
* be done in create_kernel_page_table.
*/
max_mapped_addr = __pa(~(ulong)0);
- if (max_mapped_addr == (dram_end - 1))
+ if (max_mapped_addr == (phys_ram_end - 1))
memblock_set_current_limit(max_mapped_addr - 4096);
#endif
- min_low_pfn = PFN_UP(memblock_start_of_DRAM());
- max_low_pfn = max_pfn = PFN_DOWN(dram_end);
+ min_low_pfn = PFN_UP(phys_ram_base);
+ max_low_pfn = max_pfn = PFN_DOWN(phys_ram_end);
dma32_phys_limit = min(4UL * SZ_1G, (unsigned long)PFN_PHYS(max_low_pfn));
set_max_mapnr(max_low_pfn - ARCH_PFN_OFFSET);
@@ -558,6 +564,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
kernel_map.xiprom = (uintptr_t)CONFIG_XIP_PHYS_ADDR;
kernel_map.xiprom_sz = (uintptr_t)(&_exiprom) - (uintptr_t)(&_xiprom);
+ phys_ram_base = CONFIG_PHYS_RAM_BASE;
kernel_map.phys_addr = (uintptr_t)CONFIG_PHYS_RAM_BASE;
kernel_map.size = (uintptr_t)(&_end) - (uintptr_t)(&_sdata);