diff options
author | Harald Koerfgen <hkoerfg@web.de> | 2000-02-13 20:52:05 +0000 |
---|---|---|
committer | Harald Koerfgen <hkoerfg@web.de> | 2000-02-13 20:52:05 +0000 |
commit | b5766e7e617734ae2426cc836a2819ed81cace0c (patch) | |
tree | 2f21c1628f61ab56fb7bf4d47ad6890997de1f25 /arch/mips/dec | |
parent | 4f1dc929c47e0d019726681daa8d78d616868b0e (diff) |
o bootmem fixes for DECstations
o declarations in pgtable.h fixed
o cache management for R3000 improved
Diffstat (limited to 'arch/mips/dec')
-rw-r--r-- | arch/mips/dec/prom/memory.c | 76 |
1 files changed, 66 insertions, 10 deletions
diff --git a/arch/mips/dec/prom/memory.c b/arch/mips/dec/prom/memory.c index 20e55fdc6..a093c45bb 100644 --- a/arch/mips/dec/prom/memory.c +++ b/arch/mips/dec/prom/memory.c @@ -3,12 +3,19 @@ * * Copyright (C) 1998 Harald Koerfgen, Frieder Streffer and Paul M. Antoine * - * $Id: memory.c,v 1.2 1999/04/11 17:06:17 harald Exp $ + * $Id: memory.c,v 1.3 1999/10/09 00:00:58 ralf Exp $ */ -#include <asm/addrspace.h> #include <linux/init.h> #include <linux/config.h> -#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/bootmem.h> + +#include <asm/addrspace.h> +#include <asm/page.h> + +#include <asm/dec/machtype.h> + #include "prom.h" typedef struct { @@ -24,10 +31,13 @@ extern int (*rex_getbitmap)(memmap *); extern int (*prom_printf)(char *, ...); #endif -extern unsigned long mips_memory_upper; - volatile unsigned long mem_err = 0; /* So we know an error occured */ +extern char _end; + +#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT) +#define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK) + /* * Probe memory in 4MB chunks, waiting for an error to tell us we've fallen * off the end of real memory. Only suitable for the 2100/3100's (PMAX). @@ -79,26 +89,72 @@ unsigned long __init rex_get_memory_size(void) if (bm->bitmap[i] == 0xff) mem_size += (8 * bm->pagesize); } + return (mem_size); } void __init prom_meminit(unsigned int magic) { + unsigned long free_start, free_end, start_pfn, bootmap_size; + unsigned long mem_size = 0; + if (magic != REX_PROM_MAGIC) - mips_memory_upper = KSEG0 + pmax_get_memory_size(); + mem_size = pmax_get_memory_size(); else - mips_memory_upper = KSEG0 + rex_get_memory_size(); + mem_size = rex_get_memory_size(); + + free_start = PHYSADDR(PFN_ALIGN(&_end)); + free_end = mem_size; + start_pfn = PFN_UP((unsigned long)&_end); #ifdef PROM_DEBUG - prom_printf("mips_memory_upper: 0x%08x\n", mips_memory_upper); + prom_printf("free_start: 0x%08x\n", free_start); + prom_printf("free_end: 0x%08x\n", free_end); + prom_printf("start_pfn: 0x%08x\n", start_pfn); #endif + + /* Register all the contiguous memory with the bootmem allocator + and free it. Be careful about the bootmem freemap. */ + bootmap_size = init_bootmem(start_pfn, mem_size >> PAGE_SHIFT); + free_bootmem(free_start + bootmap_size, free_end - free_start - bootmap_size); } -/* Called from mem_init() to fixup the mem_map page settings. */ -void __init prom_fixup_mem_map(unsigned long start, unsigned long end) +int __init page_is_ram(unsigned long pagenr) { + return 1; } void prom_free_prom_memory (void) { + unsigned long addr, end; + extern char _ftext; + + /* + * Free everything below the kernel itself but leave + * the first page reserved for the exception handlers. + */ + +#ifdef CONFIG_DECLANCE + /* + * Leave 128 KB reserved for Lance memory for + * IOASIC DECstations. + * + * XXX: save this address for use in dec_lance.c? + */ + if (IOASIC) + end = PHYSADDR(&_ftext) - 0x00020000; + else +#endif + end = PHYSADDR(&_ftext); + + addr = PAGE_SIZE; + while (addr < end) { + ClearPageReserved(mem_map + MAP_NR(addr)); + set_page_count(mem_map + MAP_NR(addr), 1); + free_page(addr); + addr += PAGE_SIZE; + } + + printk("Freeing unused PROM memory: %dk freed\n", + (end - PAGE_SIZE) >> 10); } |