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ce5ad03e45
Now there 5 places which calculate max_pfn & max_low_pfn: 1. in fdt_setup() for FDT systems; 2. in memblock_init() for ACPI systems; 3. in init_numa_memory() for NUMA systems; 4. in arch_mem_init() to recalculate for "mem=" cmdline; 5. in paging_init() to recalculate for NUMA systems. Since memblock_init() is called both for ACPI and FDT systems, move the calculation out of the for_each_efi_memory_desc() loop can eliminate the first case. The last case is very questionable (may be derived from the MIPS/Loongson code) and breaks the "mem=" cmdline, so should be removed. And then the NUMA version of paging_init() can be also eliminated. After consolidation there are 3 places of calculation: 1. in memblock_init() for both ACPI and FDT systems; 2. in init_numa_memory() to recalculate for NUMA systems; 3. in arch_mem_init() to recalculate for the "mem=" cmdline. For all cases the calculation is: max_pfn = PFN_DOWN(memblock_end_of_DRAM()); max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn); Cc: stable@vger.kernel.org Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/efi.h>
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#include <linux/initrd.h>
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#include <linux/memblock.h>
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#include <asm/bootinfo.h>
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#include <asm/loongson.h>
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#include <asm/sections.h>
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void __init memblock_init(void)
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{
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u32 mem_type;
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u64 mem_start, mem_size;
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efi_memory_desc_t *md;
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/* Parse memory information */
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for_each_efi_memory_desc(md) {
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mem_type = md->type;
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mem_start = md->phys_addr;
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mem_size = md->num_pages << EFI_PAGE_SHIFT;
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switch (mem_type) {
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case EFI_LOADER_CODE:
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case EFI_LOADER_DATA:
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case EFI_BOOT_SERVICES_CODE:
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case EFI_BOOT_SERVICES_DATA:
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case EFI_PERSISTENT_MEMORY:
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case EFI_CONVENTIONAL_MEMORY:
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memblock_add(mem_start, mem_size);
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break;
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case EFI_PAL_CODE:
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case EFI_UNUSABLE_MEMORY:
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case EFI_ACPI_RECLAIM_MEMORY:
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memblock_add(mem_start, mem_size);
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fallthrough;
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case EFI_RESERVED_TYPE:
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case EFI_RUNTIME_SERVICES_CODE:
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case EFI_RUNTIME_SERVICES_DATA:
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case EFI_MEMORY_MAPPED_IO:
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case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
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memblock_reserve(mem_start, mem_size);
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break;
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}
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}
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max_pfn = PFN_DOWN(memblock_end_of_DRAM());
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max_low_pfn = min(PFN_DOWN(HIGHMEM_START), max_pfn);
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memblock_set_current_limit(PFN_PHYS(max_low_pfn));
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/* Reserve the first 2MB */
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memblock_reserve(PHYS_OFFSET, 0x200000);
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/* Reserve the kernel text/data/bss */
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memblock_reserve(__pa_symbol(&_text),
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__pa_symbol(&_end) - __pa_symbol(&_text));
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memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
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memblock_set_node(0, PHYS_ADDR_MAX, &memblock.reserved, 0);
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}
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