* Modifications by Paul Mackerras (PowerMac) (paulus@cs.anu.edu.au)
* and Cort Dougan (PReP) (cort@cs.nmt.edu)
* Copyright (C) 1996 Paul Mackerras
- * Amiga/APUS changes by Jesper Skov (jskov@cygnus.co.uk).
*
* Derived from "arch/i386/mm/init.c"
* Copyright (C) 1991, 1992, 1993, 1994 Linus Torvalds
#include <asm/mmu.h>
#include <asm/uaccess.h>
#include <asm/smp.h>
-#include <asm/bootx.h>
#include <asm/machdep.h>
#include <asm/setup.h>
+#include "mmu_decl.h"
+
extern void loadcam_entry(unsigned int index);
unsigned int tlbcam_index;
unsigned int num_tlbcam_entries;
static unsigned long __cam0, __cam1, __cam2;
-extern unsigned long total_lowmem;
-extern unsigned long __max_low_memory;
-#define MAX_LOW_MEM CONFIG_LOWMEM_SIZE
#define NUM_TLBCAMS (16)
void __init cam_mapin_ram(unsigned long cam0, unsigned long cam1,
unsigned long cam2)
{
- settlbcam(0, KERNELBASE, PPC_MEMSTART, cam0, _PAGE_KERNEL, 0);
+ settlbcam(0, PAGE_OFFSET, memstart_addr, cam0, _PAGE_KERNEL, 0);
tlbcam_index++;
if (cam1) {
tlbcam_index++;
- settlbcam(1, KERNELBASE+cam0, PPC_MEMSTART+cam0, cam1, _PAGE_KERNEL, 0);
+ settlbcam(1, PAGE_OFFSET+cam0, memstart_addr+cam0, cam1, _PAGE_KERNEL, 0);
}
if (cam2) {
tlbcam_index++;
- settlbcam(2, KERNELBASE+cam0+cam1, PPC_MEMSTART+cam0+cam1, cam2, _PAGE_KERNEL, 0);
+ settlbcam(2, PAGE_OFFSET+cam0+cam1, memstart_addr+cam0+cam1, cam2, _PAGE_KERNEL, 0);
}
}
void __init
adjust_total_lowmem(void)
{
- unsigned long max_low_mem = MAX_LOW_MEM;
- unsigned long cam_max = 0x10000000;
- unsigned long ram;
+ phys_addr_t max_lowmem_size = __max_low_memory;
+ phys_addr_t cam_max_size = 0x10000000;
+ phys_addr_t ram;
- /* adjust CAM size to max_low_mem */
- if (max_low_mem < cam_max)
- cam_max = max_low_mem;
+ /* adjust CAM size to max_lowmem_size */
+ if (max_lowmem_size < cam_max_size)
+ cam_max_size = max_lowmem_size;
- /* adjust lowmem size to max_low_mem */
- if (max_low_mem < total_lowmem)
- ram = max_low_mem;
- else
- ram = total_lowmem;
+ /* adjust lowmem size to max_lowmem_size */
+ ram = min(max_lowmem_size, (phys_addr_t)total_lowmem);
/* Calculate CAM values */
__cam0 = 1UL << 2 * (__ilog2(ram) / 2);
- if (__cam0 > cam_max)
- __cam0 = cam_max;
+ if (__cam0 > cam_max_size)
+ __cam0 = cam_max_size;
ram -= __cam0;
if (ram) {
__cam1 = 1UL << 2 * (__ilog2(ram) / 2);
- if (__cam1 > cam_max)
- __cam1 = cam_max;
+ if (__cam1 > cam_max_size)
+ __cam1 = cam_max_size;
ram -= __cam1;
}
if (ram) {
__cam2 = 1UL << 2 * (__ilog2(ram) / 2);
- if (__cam2 > cam_max)
- __cam2 = cam_max;
+ if (__cam2 > cam_max_size)
+ __cam2 = cam_max_size;
ram -= __cam2;
}
" CAM2=%ldMb residual: %ldMb\n",
__cam0 >> 20, __cam1 >> 20, __cam2 >> 20,
(total_lowmem - __cam0 - __cam1 - __cam2) >> 20);
- __max_low_memory = max_low_mem = __cam0 + __cam1 + __cam2;
+ __max_low_memory = __cam0 + __cam1 + __cam2;
+ __initial_memory_limit_addr = memstart_addr + __max_low_memory;
}