[PATCH 3/5] RISC-V: Move setup_bootmem() to mm/init.c

Anup Patel
2019-01-07T16:11:26Z

From: Anup Patel <anup.patel@wdc.com>

The setup_bootmem() mainly populates memblocks and does
early memory reservations. The right location for this
function is mm/init.c.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
---
arch/riscv/include/asm/pgtable.h | 1 +
arch/riscv/kernel/setup.c | 48 ++++----------------------------
arch/riscv/mm/init.c | 40 ++++++++++++++++++++++++++
3 files changed, 46 insertions(+), 43 deletions(-)

diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 16301966d65b..35893810cba3 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -404,6 +404,7 @@ static inline int ptep_clear_flush_young(struct vm_area_struct *vma,
#define kern_addr_valid(addr) (1) /* FIXME */
#endif

+extern void setup_bootmem(void);
extern void paging_init(void);

static inline void pgtable_cache_init(void)
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index f7132547b8b3..49a13b98e13f 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -156,49 +156,6 @@ void __init parse_dtb(unsigned int hartid, void *dtb)
early_init_dt_scan(__va(dtb));
}

-static void __init setup_bootmem(void)
-{
- struct memblock_region *reg;
- phys_addr_t mem_size = 0;
-
- /* Find the memory region containing the kernel */
- for_each_memblock(memory, reg) {
- phys_addr_t vmlinux_end = __pa(_end);
- phys_addr_t end = reg->base + reg->size;
-
- if (reg->base <= vmlinux_end && vmlinux_end <= end) {
- /*
- * Reserve from the start of the region to the end of
- * the kernel
- */
- memblock_reserve(reg->base, vmlinux_end - reg->base);
- mem_size = min(reg->size, (phys_addr_t)-PAGE_OFFSET);
- }
- }
- BUG_ON(mem_size == 0);
-
- set_max_mapnr(PFN_DOWN(mem_size));
- max_low_pfn = memblock_end_of_DRAM();
-
-#ifdef CONFIG_BLK_DEV_INITRD
- setup_initrd();
-#endif /* CONFIG_BLK_DEV_INITRD */
-
- early_init_fdt_reserve_self();
- early_init_fdt_scan_reserved_mem();
- memblock_allow_resize();
- memblock_dump_all();
-
- for_each_memblock(memory, reg) {
- unsigned long start_pfn = memblock_region_memory_base_pfn(reg);
- unsigned long end_pfn = memblock_region_memory_end_pfn(reg);
-
- memblock_set_node(PFN_PHYS(start_pfn),
- PFN_PHYS(end_pfn - start_pfn),
- &memblock.memory, 0);
- }
-}
-
void __init setup_arch(char **cmdline_p)
{
init_mm.start_code = (unsigned long) _stext;
@@ -211,6 +168,11 @@ void __init setup_arch(char **cmdline_p)
parse_early_param();

setup_bootmem();
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ setup_initrd();
+#endif /* CONFIG_BLK_DEV_INITRD */
+
paging_init();
unflatten_device_tree();

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index f354486f9b78..d0965979ee70 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -16,6 +16,7 @@
#include <linux/memblock.h>
#include <linux/swap.h>
#include <linux/sizes.h>
+#include <linux/of_fdt.h>

#include <asm/tlbflush.h>
#include <asm/sections.h>
@@ -62,3 +63,42 @@ void free_initmem(void)
{
free_initmem_default(0);
}
+
+void __init setup_bootmem(void)
+{
+ struct memblock_region *reg;
+ phys_addr_t mem_size = 0;
+
+ /* Find the memory region containing the kernel */
+ for_each_memblock(memory, reg) {
+ phys_addr_t vmlinux_end = __pa(_end);
+ phys_addr_t end = reg->base + reg->size;
+
+ if (reg->base <= vmlinux_end && vmlinux_end <= end) {
+ /*
+ * Reserve from the start of the region to the end of
+ * the kernel
+ */
+ memblock_reserve(reg->base, vmlinux_end - reg->base);
+ mem_size = min(reg->size, (phys_addr_t)-PAGE_OFFSET);
+ }
+ }
+ BUG_ON(mem_size == 0);
+
+ set_max_mapnr(PFN_DOWN(mem_size));
+ max_low_pfn = memblock_end_of_DRAM();
+
+ early_init_fdt_reserve_self();
+ early_init_fdt_scan_reserved_mem();
+ memblock_allow_resize();
+ memblock_dump_all();
+
+ for_each_memblock(memory, reg) {
+ unsigned long start_pfn = memblock_region_memory_base_pfn(reg);
+ unsigned long end_pfn = memblock_region_memory_end_pfn(reg);
+
+ memblock_set_node(PFN_PHYS(start_pfn),
+ PFN_PHYS(end_pfn - start_pfn),
+ &memblock.memory, 0);
+ }
+}
--
2.17.1