%PDF-
%PDF-
Mini Shell
Mini Shell
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _M68K_TLBFLUSH_H
#define _M68K_TLBFLUSH_H
#ifdef CONFIG_MMU
#ifndef CONFIG_SUN3
#include <asm/current.h>
#include <asm/mcfmmu.h>
static inline void flush_tlb_kernel_page(void *addr)
{
if (CPU_IS_COLDFIRE) {
mmu_write(MMUOR, MMUOR_CNL);
} else if (CPU_IS_040_OR_060) {
set_fc(SUPER_DATA);
__asm__ __volatile__(".chip 68040\n\t"
"pflush (%0)\n\t"
".chip 68k"
: : "a" (addr));
set_fc(USER_DATA);
} else if (CPU_IS_020_OR_030)
__asm__ __volatile__("pflush #4,#4,(%0)" : : "a" (addr));
}
/*
* flush all user-space atc entries.
*/
static inline void __flush_tlb(void)
{
if (CPU_IS_COLDFIRE) {
mmu_write(MMUOR, MMUOR_CNL);
} else if (CPU_IS_040_OR_060) {
__asm__ __volatile__(".chip 68040\n\t"
"pflushan\n\t"
".chip 68k");
} else if (CPU_IS_020_OR_030) {
__asm__ __volatile__("pflush #0,#4");
}
}
static inline void __flush_tlb040_one(unsigned long addr)
{
__asm__ __volatile__(".chip 68040\n\t"
"pflush (%0)\n\t"
".chip 68k"
: : "a" (addr));
}
static inline void __flush_tlb_one(unsigned long addr)
{
if (CPU_IS_COLDFIRE)
mmu_write(MMUOR, MMUOR_CNL);
else if (CPU_IS_040_OR_060)
__flush_tlb040_one(addr);
else if (CPU_IS_020_OR_030)
__asm__ __volatile__("pflush #0,#4,(%0)" : : "a" (addr));
}
#define flush_tlb() __flush_tlb()
/*
* flush all atc entries (both kernel and user-space entries).
*/
static inline void flush_tlb_all(void)
{
if (CPU_IS_COLDFIRE) {
mmu_write(MMUOR, MMUOR_CNL);
} else if (CPU_IS_040_OR_060) {
__asm__ __volatile__(".chip 68040\n\t"
"pflusha\n\t"
".chip 68k");
} else if (CPU_IS_020_OR_030) {
__asm__ __volatile__("pflusha");
}
}
static inline void flush_tlb_mm(struct mm_struct *mm)
{
if (mm == current->active_mm)
__flush_tlb();
}
static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
if (vma->vm_mm == current->active_mm)
__flush_tlb_one(addr);
}
static inline void flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
if (vma->vm_mm == current->active_mm)
__flush_tlb();
}
static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
flush_tlb_all();
}
#else
/* Reserved PMEGs. */
extern char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
extern unsigned long pmeg_vaddr[SUN3_PMEGS_NUM];
extern unsigned char pmeg_alloc[SUN3_PMEGS_NUM];
extern unsigned char pmeg_ctx[SUN3_PMEGS_NUM];
/* Flush all userspace mappings one by one... (why no flush command,
sun?) */
static inline void flush_tlb_all(void)
{
unsigned long addr;
unsigned char ctx, oldctx;
oldctx = sun3_get_context();
for(addr = 0x00000000; addr < TASK_SIZE; addr += SUN3_PMEG_SIZE) {
for(ctx = 0; ctx < 8; ctx++) {
sun3_put_context(ctx);
sun3_put_segmap(addr, SUN3_INVALID_PMEG);
}
}
sun3_put_context(oldctx);
/* erase all of the userspace pmeg maps, we've clobbered them
all anyway */
for(addr = 0; addr < SUN3_INVALID_PMEG; addr++) {
if(pmeg_alloc[addr] == 1) {
pmeg_alloc[addr] = 0;
pmeg_ctx[addr] = 0;
pmeg_vaddr[addr] = 0;
}
}
}
/* Clear user TLB entries within the context named in mm */
static inline void flush_tlb_mm (struct mm_struct *mm)
{
unsigned char oldctx;
unsigned char seg;
unsigned long i;
oldctx = sun3_get_context();
sun3_put_context(mm->context);
for(i = 0; i < TASK_SIZE; i += SUN3_PMEG_SIZE) {
seg = sun3_get_segmap(i);
if(seg == SUN3_INVALID_PMEG)
continue;
sun3_put_segmap(i, SUN3_INVALID_PMEG);
pmeg_alloc[seg] = 0;
pmeg_ctx[seg] = 0;
pmeg_vaddr[seg] = 0;
}
sun3_put_context(oldctx);
}
/* Flush a single TLB page. In this case, we're limited to flushing a
single PMEG */
static inline void flush_tlb_page (struct vm_area_struct *vma,
unsigned long addr)
{
unsigned char oldctx;
unsigned char i;
oldctx = sun3_get_context();
sun3_put_context(vma->vm_mm->context);
addr &= ~SUN3_PMEG_MASK;
if((i = sun3_get_segmap(addr)) != SUN3_INVALID_PMEG)
{
pmeg_alloc[i] = 0;
pmeg_ctx[i] = 0;
pmeg_vaddr[i] = 0;
sun3_put_segmap (addr, SUN3_INVALID_PMEG);
}
sun3_put_context(oldctx);
}
/* Flush a range of pages from TLB. */
static inline void flush_tlb_range (struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
struct mm_struct *mm = vma->vm_mm;
unsigned char seg, oldctx;
start &= ~SUN3_PMEG_MASK;
oldctx = sun3_get_context();
sun3_put_context(mm->context);
while(start < end)
{
if((seg = sun3_get_segmap(start)) == SUN3_INVALID_PMEG)
goto next;
if(pmeg_ctx[seg] == mm->context) {
pmeg_alloc[seg] = 0;
pmeg_ctx[seg] = 0;
pmeg_vaddr[seg] = 0;
}
sun3_put_segmap(start, SUN3_INVALID_PMEG);
next:
start += SUN3_PMEG_SIZE;
}
}
static inline void flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
flush_tlb_all();
}
/* Flush kernel page from TLB. */
static inline void flush_tlb_kernel_page (unsigned long addr)
{
sun3_put_segmap (addr & ~(SUN3_PMEG_SIZE - 1), SUN3_INVALID_PMEG);
}
#endif
#else /* !CONFIG_MMU */
/*
* flush all user-space atc entries.
*/
static inline void __flush_tlb(void)
{
BUG();
}
static inline void __flush_tlb_one(unsigned long addr)
{
BUG();
}
#define flush_tlb() __flush_tlb()
/*
* flush all atc entries (both kernel and user-space entries).
*/
static inline void flush_tlb_all(void)
{
BUG();
}
static inline void flush_tlb_mm(struct mm_struct *mm)
{
BUG();
}
static inline void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
BUG();
}
static inline void flush_tlb_range(struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
BUG();
}
static inline void flush_tlb_kernel_page(unsigned long addr)
{
BUG();
}
#endif /* CONFIG_MMU */
#endif /* _M68K_TLBFLUSH_H */
Zerion Mini Shell 1.0