Merge tag 'devicetree-for-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / arch / riscv / mm / init.c

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index a14bf39..93720b0 100644 (file)
--- 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
@@ -191,15 +197,15 @@ static void __init setup_bootmem(void)
         * if end of dram is equal to maximum addressable memory.  For 64-bit
         * kernel, this problem can't happen here as the end of the virtual
         * address space is occupied by the kernel mapping then this check must
-        * be done in create_kernel_page_table.
+        * be done as soon as the kernel mapping base address is determined.
         */
        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);
 
@@ -853,26 +860,6 @@ static void __init reserve_crashkernel(void)
 }
 #endif /* CONFIG_KEXEC_CORE */
 
-#ifdef CONFIG_CRASH_DUMP
-/*
- * We keep track of the ELF core header of the crashed
- * kernel with a reserved-memory region with compatible
- * string "linux,elfcorehdr". Here we register a callback
- * to populate elfcorehdr_addr/size when this region is
- * present. Note that this region will be marked as
- * reserved once we call early_init_fdt_scan_reserved_mem()
- * later on.
- */
-static int __init elfcore_hdr_setup(struct reserved_mem *rmem)
-{
-       elfcorehdr_addr = rmem->base;
-       elfcorehdr_size = rmem->size;
-       return 0;
-}
-
-RESERVEDMEM_OF_DECLARE(elfcorehdr, "linux,elfcorehdr", elfcore_hdr_setup);
-#endif
-
 void __init paging_init(void)
 {
        setup_bootmem();