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Changed the way in which virtual address space is reserved for the SA110

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fast cache clean area as the recent pmap changes mean that the existing
approach no longer works. Fixes PR7272.
This commit is contained in:
mark 1999-04-06 06:57:00 +00:00
parent c05b9ed27a
commit 46b87f5da5
1 changed files with 23 additions and 13 deletions
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36
sys/arch/arm32/riscpc/rpc_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: rpc_machdep.c,v 1.26 1999/03/29 10:02:20 mycroft Exp $ */
/* $NetBSD: rpc_machdep.c,v 1.27 1999/04/06 06:57:00 mark Exp $ */
/*
* Copyright (c) 1994-1998 Mark Brinicombe.
@ -63,6 +63,7 @@
#include <ddb/db_extern.h>
#include <vm/vm_kern.h>
#include <uvm/uvm.h>
#include <machine/signal.h>
#include <machine/frame.h>
@ -153,6 +154,11 @@ struct user *proc0paddr;
extern int cold;
#ifdef CPU_SA110
#define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2)
static vaddr_t sa110_cc_base;
#endif /* CPU_SA110 */
/* Prototypes */
void physcon_display_base __P((u_int addr));
@ -812,6 +818,17 @@ initarm(bootconf)
alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG);
#ifdef CPU_SA110
/*
* XXX totally stuffed hack to work round problems introduced
* in recent versions of the pmap code. Due to the calls used there
* we cannot allocate virtual memory during bootstrap.
*/
sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start)
+ (CPU_SA110_CACHE_CLEAN_SIZE - 1))
& ~(CPU_SA110_CACHE_CLEAN_SIZE - 1);
#endif /* CPU_SA110 */
/*
* Ok we have allocated physical pages for the primary kernel
* page tables
@ -1332,24 +1349,17 @@ extern unsigned int sa110_cache_clean_size;
void
rpc_sa110_cc_setup(void)
{
vm_offset_t addr;
int cleanarea;
int loop;
vm_offset_t kaddr;
pt_entry_t *pte;
extern vm_offset_t virtual_start;
cleanarea = 0x4000 * 2;
addr = (virtual_start + (cleanarea - 1)) & ~(cleanarea - 1);
virtual_start = addr + cleanarea;
kaddr = pmap_extract(kernel_pmap, 0xf0000000);
for (loop = 0; loop < cleanarea; loop += NBPG) {
pte = pmap_pte(kernel_pmap, (addr + loop));
kaddr = pmap_extract(kernel_pmap, KERNEL_TEXT_BASE);
for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += NBPG) {
pte = pmap_pte(kernel_pmap, (sa110_cc_base + loop));
*pte = L2_PTE(kaddr, AP_KR);
}
sa110_cache_clean_addr = addr;
sa110_cache_clean_size = cleanarea / 2;
sa110_cache_clean_addr = sa110_cc_base;
sa110_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2;
}
#endif /* CPU_SA110 */