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author | Palmer Dabbelt <palmer@dabbelt.com> | 2017-07-11 04:00:26 +0300 |
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committer | Palmer Dabbelt <palmer@dabbelt.com> | 2017-09-27 01:26:44 +0300 |
commit | 76d2a0493a17d4c8ecc781366850c3c4f8e1a446 (patch) | |
tree | 5612f17472f4f3bd6fb49e217cb998f5c32836c4 /arch/riscv/mm/init.c | |
parent | 8caea502367056881e5209ca55a7a01775c9a1cd (diff) | |
download | linux-76d2a0493a17d4c8ecc781366850c3c4f8e1a446.tar.xz |
RISC-V: Init and Halt Code
This contains the various __init C functions, the initial assembly
kernel entry point, and the code to reset the system. When a file was
init-related this patch contains the entire file.
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
Diffstat (limited to 'arch/riscv/mm/init.c')
-rw-r--r-- | arch/riscv/mm/init.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c new file mode 100644 index 000000000000..9f4bee5e51fd --- /dev/null +++ b/arch/riscv/mm/init.c @@ -0,0 +1,70 @@ +/* + * Copyright (C) 2012 Regents of the University of California + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/init.h> +#include <linux/mm.h> +#include <linux/bootmem.h> +#include <linux/initrd.h> +#include <linux/memblock.h> +#include <linux/swap.h> + +#include <asm/tlbflush.h> +#include <asm/sections.h> +#include <asm/pgtable.h> +#include <asm/io.h> + +static void __init zone_sizes_init(void) +{ + unsigned long zones_size[MAX_NR_ZONES]; + + memset(zones_size, 0, sizeof(zones_size)); + zones_size[ZONE_NORMAL] = max_mapnr; + free_area_init_node(0, zones_size, pfn_base, NULL); +} + +void setup_zero_page(void) +{ + memset((void *)empty_zero_page, 0, PAGE_SIZE); +} + +void __init paging_init(void) +{ + init_mm.pgd = (pgd_t *)pfn_to_virt(csr_read(sptbr)); + + setup_zero_page(); + local_flush_tlb_all(); + zone_sizes_init(); +} + +void __init mem_init(void) +{ +#ifdef CONFIG_FLATMEM + BUG_ON(!mem_map); +#endif /* CONFIG_FLATMEM */ + + high_memory = (void *)(__va(PFN_PHYS(max_low_pfn))); + free_all_bootmem(); + + mem_init_print_info(NULL); +} + +void free_initmem(void) +{ + free_initmem_default(0); +} + +#ifdef CONFIG_BLK_DEV_INITRD +void free_initrd_mem(unsigned long start, unsigned long end) +{ +} +#endif /* CONFIG_BLK_DEV_INITRD */ |