korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-05 01:54:09 +08:00
Code Issues Packages Projects Releases Wiki Activity

riscv: Register System RAM as iomem resources

Browse Source 
Add System RAM to /proc/iomem, various tools expect it such as kdump.
It is also needed for page_is_ram API which checks the specified address
whether registered as System RAM in iomem_resource list.

Signed-off-by: Zong Li <zong.li@sifive.com>
[Palmer: check MEMBLOCK_NOMAP]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Zong Li 2020-06-16 15:45:46 +08:00 committed by Palmer Dabbelt
parent a2693fe254
commit 526fbaed33
No known key found for this signature in database
GPG Key ID: 2E1319F35FBB1889
1 changed files with 27 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
arch/riscv/mm/init.c
View File

@ -517,6 +517,32 @@ void mark_rodata_ro(void)
}
#endif
void __init resource_init(void)
{
struct memblock_region *region;
for_each_memblock(memory, region) {
struct resource *res;
res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES);
if (!res)
panic("%s: Failed to allocate %zu bytes\n", __func__,
sizeof(struct resource));
if (memblock_is_nomap(region)) {
res->name = "reserved";
res->flags = IORESOURCE_MEM;
} else {
res->name = "System RAM";
res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
}
res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
request_resource(&iomem_resource, res);
}
}
void __init paging_init(void)
{
setup_vm_final();
@ -524,6 +550,7 @@ void __init paging_init(void)
sparse_init();
setup_zero_page();
zone_sizes_init();
resource_init();
}
#ifdef CONFIG_SPARSEMEM_VMEMMAP