diff options
Diffstat (limited to 'arch/riscv/kernel')
-rw-r--r-- | arch/riscv/kernel/setup.c | 130 | ||||
-rw-r--r-- | arch/riscv/kernel/smp.c | 2 |
2 files changed, 5 insertions, 127 deletions
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index 12a16df4d422..ecb654f6a79e 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -23,7 +23,6 @@ #include <linux/mm.h> #include <linux/memblock.h> #include <linux/sched.h> -#include <linux/initrd.h> #include <linux/console.h> #include <linux/screen_info.h> #include <linux/of_fdt.h> @@ -61,83 +60,6 @@ EXPORT_SYMBOL(empty_zero_page); atomic_t hart_lottery; unsigned long boot_cpu_hartid; -#ifdef CONFIG_BLK_DEV_INITRD -static void __init setup_initrd(void) -{ - unsigned long size; - - if (initrd_start >= initrd_end) { - pr_info("initrd not found or empty"); - goto disable; - } - if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { - pr_err("initrd extends beyond end of memory"); - goto disable; - } - - size = initrd_end - initrd_start; - memblock_reserve(__pa(initrd_start), size); - initrd_below_start_ok = 1; - - pr_info("Initial ramdisk at: 0x%p (%lu bytes)\n", - (void *)(initrd_start), size); - return; -disable: - pr_cont(" - disabling initrd\n"); - initrd_start = 0; - initrd_end = 0; -} -#endif /* CONFIG_BLK_DEV_INITRD */ - -pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned_bss; -pgd_t trampoline_pg_dir[PTRS_PER_PGD] __initdata __aligned(PAGE_SIZE); - -#ifndef __PAGETABLE_PMD_FOLDED -#define NUM_SWAPPER_PMDS ((uintptr_t)-PAGE_OFFSET >> PGDIR_SHIFT) -pmd_t swapper_pmd[PTRS_PER_PMD*((-PAGE_OFFSET)/PGDIR_SIZE)] __page_aligned_bss; -pmd_t trampoline_pmd[PTRS_PER_PGD] __initdata __aligned(PAGE_SIZE); -#endif - -asmlinkage void __init setup_vm(void) -{ - extern char _start; - uintptr_t i; - uintptr_t pa = (uintptr_t) &_start; - pgprot_t prot = __pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_EXEC); - - va_pa_offset = PAGE_OFFSET - pa; - pfn_base = PFN_DOWN(pa); - - /* Sanity check alignment and size */ - BUG_ON((PAGE_OFFSET % PGDIR_SIZE) != 0); - BUG_ON((pa % (PAGE_SIZE * PTRS_PER_PTE)) != 0); - -#ifndef __PAGETABLE_PMD_FOLDED - trampoline_pg_dir[(PAGE_OFFSET >> PGDIR_SHIFT) % PTRS_PER_PGD] = - pfn_pgd(PFN_DOWN((uintptr_t)trampoline_pmd), - __pgprot(_PAGE_TABLE)); - trampoline_pmd[0] = pfn_pmd(PFN_DOWN(pa), prot); - - for (i = 0; i < (-PAGE_OFFSET)/PGDIR_SIZE; ++i) { - size_t o = (PAGE_OFFSET >> PGDIR_SHIFT) % PTRS_PER_PGD + i; - swapper_pg_dir[o] = - pfn_pgd(PFN_DOWN((uintptr_t)swapper_pmd) + i, - __pgprot(_PAGE_TABLE)); - } - for (i = 0; i < ARRAY_SIZE(swapper_pmd); i++) - swapper_pmd[i] = pfn_pmd(PFN_DOWN(pa + i * PMD_SIZE), prot); -#else - trampoline_pg_dir[(PAGE_OFFSET >> PGDIR_SHIFT) % PTRS_PER_PGD] = - pfn_pgd(PFN_DOWN(pa), prot); - - for (i = 0; i < (-PAGE_OFFSET)/PGDIR_SIZE; ++i) { - size_t o = (PAGE_OFFSET >> PGDIR_SHIFT) % PTRS_PER_PGD + i; - swapper_pg_dir[o] = - pfn_pgd(PFN_DOWN(pa + i * PGDIR_SIZE), prot); - } -#endif -} - void __init parse_dtb(unsigned int hartid, void *dtb) { if (early_init_dt_scan(__va(dtb))) @@ -150,60 +72,17 @@ void __init parse_dtb(unsigned int hartid, void *dtb) #endif } -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 = PFN_DOWN(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) { - *cmdline_p = boot_command_line; - - parse_early_param(); - init_mm.start_code = (unsigned long) _stext; init_mm.end_code = (unsigned long) _etext; init_mm.end_data = (unsigned long) _edata; init_mm.brk = (unsigned long) _end; + *cmdline_p = boot_command_line; + + parse_early_param(); + setup_bootmem(); paging_init(); unflatten_device_tree(); @@ -222,4 +101,3 @@ void __init setup_arch(char **cmdline_p) riscv_fill_hwcap(); } - diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c index ca99f0fb49b1..0c41d07ec281 100644 --- a/arch/riscv/kernel/smp.c +++ b/arch/riscv/kernel/smp.c @@ -42,7 +42,7 @@ unsigned long __cpuid_to_hartid_map[NR_CPUS] = { void __init smp_setup_processor_id(void) { - cpuid_to_hartid_map(0) = boot_cpu_hartid; + cpuid_to_hartid_map(0) = boot_cpu_hartid; } /* A collection of single bit ipi messages. */ |