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https://github.com/edk2-porting/linux-next.git
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[PATCH] i386: Move e820/efi memmap walking code to e820.c
This patch moves e820/efi memmap table walking function from setup.c to e820.c, also this patch adds extern declaration in header file. Signed-off-by: bibo,mao <bibo.mao@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> arch/i386/kernel/e820.c | 115 +++++++++++++++++++++++++++++++++ arch/i386/kernel/setup.c | 118 ----------------------------------- include/asm-i386/e820.h | 2 arch/i386/kernel/e820.c | 115 +++++++++++++++++++++++++++++++++++++++++++++ arch/i386/kernel/setup.c | 118 ----------------------------------------------- include/asm-i386/e820.h | 2 3 files changed, 117 insertions(+), 118 deletions(-)
This commit is contained in:
bibo,mao
Andi Kleen
parent
b2dff6a88c
commit
b5b2405706
@ -28,6 +28,11 @@ static struct change_member change_point_list[2*E820MAX] __initdata;
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static struct change_member *change_point[2*E820MAX] __initdata;
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static struct e820entry *overlap_list[E820MAX] __initdata;
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static struct e820entry new_bios[E820MAX] __initdata;
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/* For PCI or other memory-mapped resources */
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unsigned long pci_mem_start = 0x10000000;
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#ifdef CONFIG_PCI
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EXPORT_SYMBOL(pci_mem_start);
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#endif
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struct resource data_resource = {
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.name = "Kernel data",
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.start = 0,
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@ -591,3 +596,113 @@ void __init find_max_pfn(void)
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memory_present(0, start, end);
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}
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}
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/*
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* Free all available memory for boot time allocation. Used
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* as a callback function by efi_memory_walk()
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*/
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static int __init
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free_available_memory(unsigned long start, unsigned long end, void *arg)
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{
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/* check max_low_pfn */
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if (start >= (max_low_pfn << PAGE_SHIFT))
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return 0;
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if (end >= (max_low_pfn << PAGE_SHIFT))
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end = max_low_pfn << PAGE_SHIFT;
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if (start < end)
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free_bootmem(start, end - start);
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return 0;
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}
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/*
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* Register fully available low RAM pages with the bootmem allocator.
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*/
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void __init register_bootmem_low_pages(unsigned long max_low_pfn)
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{
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int i;
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if (efi_enabled) {
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efi_memmap_walk(free_available_memory, NULL);
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return;
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}
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for (i = 0; i < e820.nr_map; i++) {
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unsigned long curr_pfn, last_pfn, size;
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/*
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* Reserve usable low memory
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*/
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if (e820.map[i].type != E820_RAM)
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continue;
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/*
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* We are rounding up the start address of usable memory:
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*/
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curr_pfn = PFN_UP(e820.map[i].addr);
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if (curr_pfn >= max_low_pfn)
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continue;
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/*
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* ... and at the end of the usable range downwards:
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*/
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last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
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if (last_pfn > max_low_pfn)
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last_pfn = max_low_pfn;
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/*
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* .. finally, did all the rounding and playing
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* around just make the area go away?
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*/
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if (last_pfn <= curr_pfn)
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continue;
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size = last_pfn - curr_pfn;
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free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
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}
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}
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void __init register_memory(void)
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{
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unsigned long gapstart, gapsize, round;
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unsigned long long last;
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int i;
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/*
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* Search for the bigest gap in the low 32 bits of the e820
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* memory space.
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*/
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last = 0x100000000ull;
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gapstart = 0x10000000;
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gapsize = 0x400000;
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i = e820.nr_map;
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while (--i >= 0) {
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unsigned long long start = e820.map[i].addr;
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unsigned long long end = start + e820.map[i].size;
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/*
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* Since "last" is at most 4GB, we know we'll
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* fit in 32 bits if this condition is true
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*/
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if (last > end) {
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unsigned long gap = last - end;
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if (gap > gapsize) {
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gapsize = gap;
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gapstart = end;
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}
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}
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if (start < last)
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last = start;
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}
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/*
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* See how much we want to round up: start off with
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* rounding to the next 1MB area.
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*/
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round = 0x100000;
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while ((gapsize >> 4) > round)
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round += round;
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/* Fun with two's complement */
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pci_mem_start = (gapstart + round) & -round;
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printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
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pci_mem_start, gapstart, gapsize);
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}
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@ -94,12 +94,6 @@ unsigned int machine_submodel_id;
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unsigned int BIOS_revision;
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unsigned int mca_pentium_flag;
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/* For PCI or other memory-mapped resources */
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unsigned long pci_mem_start = 0x10000000;
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#ifdef CONFIG_PCI
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EXPORT_SYMBOL(pci_mem_start);
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#endif
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/* Boot loader ID as an integer, for the benefit of proc_dointvec */
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int bootloader_type;
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@ -475,68 +469,6 @@ unsigned long __init find_max_low_pfn(void)
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return max_low_pfn;
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}
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/*
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* Free all available memory for boot time allocation. Used
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* as a callback function by efi_memory_walk()
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*/
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static int __init
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free_available_memory(unsigned long start, unsigned long end, void *arg)
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{
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/* check max_low_pfn */
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if (start >= (max_low_pfn << PAGE_SHIFT))
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return 0;
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if (end >= (max_low_pfn << PAGE_SHIFT))
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end = max_low_pfn << PAGE_SHIFT;
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if (start < end)
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free_bootmem(start, end - start);
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return 0;
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}
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/*
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* Register fully available low RAM pages with the bootmem allocator.
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*/
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static void __init register_bootmem_low_pages(unsigned long max_low_pfn)
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{
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int i;
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if (efi_enabled) {
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efi_memmap_walk(free_available_memory, NULL);
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return;
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}
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for (i = 0; i < e820.nr_map; i++) {
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unsigned long curr_pfn, last_pfn, size;
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/*
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* Reserve usable low memory
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*/
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if (e820.map[i].type != E820_RAM)
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continue;
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/*
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* We are rounding up the start address of usable memory:
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*/
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curr_pfn = PFN_UP(e820.map[i].addr);
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if (curr_pfn >= max_low_pfn)
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continue;
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/*
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* ... and at the end of the usable range downwards:
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*/
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last_pfn = PFN_DOWN(e820.map[i].addr + e820.map[i].size);
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if (last_pfn > max_low_pfn)
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last_pfn = max_low_pfn;
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/*
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* .. finally, did all the rounding and playing
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* around just make the area go away?
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*/
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if (last_pfn <= curr_pfn)
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continue;
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size = last_pfn - curr_pfn;
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free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(size));
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}
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}
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/*
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* workaround for Dell systems that neglect to reserve EBDA
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*/
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@ -705,56 +637,6 @@ void __init remapped_pgdat_init(void)
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}
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}
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static void __init register_memory(void)
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{
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unsigned long gapstart, gapsize, round;
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unsigned long long last;
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int i;
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/*
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* Search for the bigest gap in the low 32 bits of the e820
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* memory space.
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*/
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last = 0x100000000ull;
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gapstart = 0x10000000;
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gapsize = 0x400000;
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i = e820.nr_map;
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while (--i >= 0) {
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unsigned long long start = e820.map[i].addr;
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unsigned long long end = start + e820.map[i].size;
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/*
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* Since "last" is at most 4GB, we know we'll
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* fit in 32 bits if this condition is true
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*/
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if (last > end) {
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unsigned long gap = last - end;
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if (gap > gapsize) {
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gapsize = gap;
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gapstart = end;
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}
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}
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if (start < last)
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last = start;
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}
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/*
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* See how much we want to round up: start off with
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* rounding to the next 1MB area.
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*/
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round = 0x100000;
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while ((gapsize >> 4) > round)
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round += round;
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/* Fun with two's complement */
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pci_mem_start = (gapstart + round) & -round;
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printk("Allocating PCI resources starting at %08lx (gap: %08lx:%08lx)\n",
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pci_mem_start, gapstart, gapsize);
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}
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#ifdef CONFIG_MCA
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static void set_mca_bus(int x)
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{
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@ -39,6 +39,8 @@ extern struct e820map e820;
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extern int e820_all_mapped(unsigned long start, unsigned long end,
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unsigned type);
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extern void find_max_pfn(void);
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extern void register_bootmem_low_pages(unsigned long max_low_pfn);
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extern void register_memory(void);
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#endif/*!__ASSEMBLY__*/
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