diff options
Diffstat (limited to 'arch/mips/ddb5074/prom.c')
| -rw-r--r-- | arch/mips/ddb5074/prom.c | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/arch/mips/ddb5074/prom.c b/arch/mips/ddb5074/prom.c index 277d37630..812b92295 100644 --- a/arch/mips/ddb5074/prom.c +++ b/arch/mips/ddb5074/prom.c @@ -4,19 +4,29 @@ * Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com> * Sony Suprastructure Center Europe (SUPC-E), Brussels * - * $Id$ + * $Id: prom.c,v 1.1 2000/01/26 00:07:44 ralf Exp $ */ #include <linux/init.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/bootmem.h> #include <asm/addrspace.h> #include <asm/bootinfo.h> char arcs_cmdline[CL_SIZE]; +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) + + void __init prom_init(const char *s) { int i = 0; + unsigned long mem_size, free_start, free_end, start_pfn, bootmap_size; // _serinit(); @@ -28,7 +38,19 @@ void __init prom_init(const char *s) mips_machgroup = MACH_GROUP_NEC_DDB; mips_machtype = MACH_NEC_DDB5074; /* 64 MB non-upgradable */ - mips_memory_upper = KSEG0+64*1024*1024; + mem_size = 64 << 20; + + free_start = PHYSADDR(PFN_ALIGN(&_end)); + free_end = mem_size; + start_pfn = PFN_UP((unsigned long)&_end); + + /* 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 the entire available memory after the _end symbol. */ + free_start += bootmap_size; + free_bootmem(free_start, free_end-free_start); } void __init prom_fixup_mem_map(unsigned long start, unsigned long end) |