1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
158 lines
4.0 KiB
C
158 lines
4.0 KiB
C
/*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Copyright (C) 1994 - 2003 by Ralf Baechle
|
|
*/
|
|
#include <linux/config.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/mm.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
#include <asm/processor.h>
|
|
#include <asm/cpu.h>
|
|
#include <asm/cpu-features.h>
|
|
|
|
/* Cache operations. */
|
|
void (*flush_cache_all)(void);
|
|
void (*__flush_cache_all)(void);
|
|
void (*flush_cache_mm)(struct mm_struct *mm);
|
|
void (*flush_cache_range)(struct vm_area_struct *vma, unsigned long start,
|
|
unsigned long end);
|
|
void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);
|
|
void (*flush_icache_range)(unsigned long start, unsigned long end);
|
|
void (*flush_icache_page)(struct vm_area_struct *vma, struct page *page);
|
|
|
|
/* MIPS specific cache operations */
|
|
void (*flush_cache_sigtramp)(unsigned long addr);
|
|
void (*flush_data_cache_page)(unsigned long addr);
|
|
void (*flush_icache_all)(void);
|
|
|
|
#ifdef CONFIG_DMA_NONCOHERENT
|
|
|
|
/* DMA cache operations. */
|
|
void (*_dma_cache_wback_inv)(unsigned long start, unsigned long size);
|
|
void (*_dma_cache_wback)(unsigned long start, unsigned long size);
|
|
void (*_dma_cache_inv)(unsigned long start, unsigned long size);
|
|
|
|
EXPORT_SYMBOL(_dma_cache_wback_inv);
|
|
EXPORT_SYMBOL(_dma_cache_wback);
|
|
EXPORT_SYMBOL(_dma_cache_inv);
|
|
|
|
#endif /* CONFIG_DMA_NONCOHERENT */
|
|
|
|
/*
|
|
* We could optimize the case where the cache argument is not BCACHE but
|
|
* that seems very atypical use ...
|
|
*/
|
|
asmlinkage int sys_cacheflush(unsigned long addr, unsigned long int bytes,
|
|
unsigned int cache)
|
|
{
|
|
if (!access_ok(VERIFY_WRITE, (void *) addr, bytes))
|
|
return -EFAULT;
|
|
|
|
flush_icache_range(addr, addr + bytes);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __flush_dcache_page(struct page *page)
|
|
{
|
|
struct address_space *mapping = page_mapping(page);
|
|
unsigned long addr;
|
|
|
|
if (mapping && !mapping_mapped(mapping)) {
|
|
SetPageDcacheDirty(page);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We could delay the flush for the !page_mapping case too. But that
|
|
* case is for exec env/arg pages and those are %99 certainly going to
|
|
* get faulted into the tlb (and thus flushed) anyways.
|
|
*/
|
|
addr = (unsigned long) page_address(page);
|
|
flush_data_cache_page(addr);
|
|
}
|
|
|
|
EXPORT_SYMBOL(__flush_dcache_page);
|
|
|
|
void __update_cache(struct vm_area_struct *vma, unsigned long address,
|
|
pte_t pte)
|
|
{
|
|
struct page *page;
|
|
unsigned long pfn, addr;
|
|
|
|
pfn = pte_pfn(pte);
|
|
if (pfn_valid(pfn) && (page = pfn_to_page(pfn), page_mapping(page)) &&
|
|
Page_dcache_dirty(page)) {
|
|
if (pages_do_alias((unsigned long)page_address(page),
|
|
address & PAGE_MASK)) {
|
|
addr = (unsigned long) page_address(page);
|
|
flush_data_cache_page(addr);
|
|
}
|
|
|
|
ClearPageDcacheDirty(page);
|
|
}
|
|
}
|
|
|
|
extern void ld_mmu_r23000(void);
|
|
extern void ld_mmu_r4xx0(void);
|
|
extern void ld_mmu_tx39(void);
|
|
extern void ld_mmu_r6000(void);
|
|
extern void ld_mmu_tfp(void);
|
|
extern void ld_mmu_andes(void);
|
|
extern void ld_mmu_sb1(void);
|
|
|
|
void __init cpu_cache_init(void)
|
|
{
|
|
if (cpu_has_4ktlb) {
|
|
#if defined(CONFIG_CPU_R4X00) || defined(CONFIG_CPU_VR41XX) || \
|
|
defined(CONFIG_CPU_R4300) || defined(CONFIG_CPU_R5000) || \
|
|
defined(CONFIG_CPU_NEVADA) || defined(CONFIG_CPU_R5432) || \
|
|
defined(CONFIG_CPU_R5500) || defined(CONFIG_CPU_MIPS32) || \
|
|
defined(CONFIG_CPU_MIPS64) || defined(CONFIG_CPU_TX49XX) || \
|
|
defined(CONFIG_CPU_RM7000) || defined(CONFIG_CPU_RM9000)
|
|
ld_mmu_r4xx0();
|
|
#endif
|
|
} else switch (current_cpu_data.cputype) {
|
|
#ifdef CONFIG_CPU_R3000
|
|
case CPU_R2000:
|
|
case CPU_R3000:
|
|
case CPU_R3000A:
|
|
case CPU_R3081E:
|
|
ld_mmu_r23000();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_CPU_TX39XX
|
|
case CPU_TX3912:
|
|
case CPU_TX3922:
|
|
case CPU_TX3927:
|
|
ld_mmu_tx39();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_CPU_R10000
|
|
case CPU_R10000:
|
|
case CPU_R12000:
|
|
ld_mmu_r4xx0();
|
|
break;
|
|
#endif
|
|
#ifdef CONFIG_CPU_SB1
|
|
case CPU_SB1:
|
|
ld_mmu_sb1();
|
|
break;
|
|
#endif
|
|
|
|
case CPU_R8000:
|
|
panic("R8000 is unsupported");
|
|
break;
|
|
|
|
default:
|
|
panic("Yeee, unsupported cache architecture.");
|
|
}
|
|
}
|