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Diffstat (limited to 'arch/m68k/sun3/mmu_emu.c')
-rw-r--r--arch/m68k/sun3/mmu_emu.c110
1 files changed, 56 insertions, 54 deletions
diff --git a/arch/m68k/sun3/mmu_emu.c b/arch/m68k/sun3/mmu_emu.c
index 8edc510a21be..b39fc3717d8e 100644
--- a/arch/m68k/sun3/mmu_emu.c
+++ b/arch/m68k/sun3/mmu_emu.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0
/*
** Tablewalk MMU emulator
**
@@ -6,26 +7,28 @@
** Started 1/16/98 @ 2:22 am
*/
+#include <linux/init.h>
#include <linux/mman.h>
#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/ptrace.h>
#include <linux/delay.h>
-#include <linux/bootmem.h>
+#include <linux/memblock.h>
#include <linux/bitops.h>
#include <linux/module.h>
+#include <linux/sched/mm.h>
+#include <linux/string_choices.h>
#include <asm/setup.h>
#include <asm/traps.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
#include <asm/page.h>
-#include <asm/pgtable.h>
#include <asm/sun3mmu.h>
-#include <asm/segment.h>
#include <asm/oplib.h>
#include <asm/mmu_context.h>
#include <asm/dvma.h>
+#include "sun3.h"
#undef DEBUG_MMU_EMU
#define DEBUG_PROM_MAPS
@@ -66,26 +69,26 @@ static unsigned char ctx_avail = CONTEXTS_NUM-1;
unsigned long rom_pages[256];
/* Print a PTE value in symbolic form. For debugging. */
-void print_pte (pte_t pte)
+static void print_pte(pte_t pte)
{
#if 0
/* Verbose version. */
unsigned long val = pte_val (pte);
- printk (" pte=%lx [addr=%lx",
+ pr_cont(" pte=%lx [addr=%lx",
val, (val & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT);
- if (val & SUN3_PAGE_VALID) printk (" valid");
- if (val & SUN3_PAGE_WRITEABLE) printk (" write");
- if (val & SUN3_PAGE_SYSTEM) printk (" sys");
- if (val & SUN3_PAGE_NOCACHE) printk (" nocache");
- if (val & SUN3_PAGE_ACCESSED) printk (" accessed");
- if (val & SUN3_PAGE_MODIFIED) printk (" modified");
+ if (val & SUN3_PAGE_VALID) pr_cont(" valid");
+ if (val & SUN3_PAGE_WRITEABLE) pr_cont(" write");
+ if (val & SUN3_PAGE_SYSTEM) pr_cont(" sys");
+ if (val & SUN3_PAGE_NOCACHE) pr_cont(" nocache");
+ if (val & SUN3_PAGE_ACCESSED) pr_cont(" accessed");
+ if (val & SUN3_PAGE_MODIFIED) pr_cont(" modified");
switch (val & SUN3_PAGE_TYPE_MASK) {
- case SUN3_PAGE_TYPE_MEMORY: printk (" memory"); break;
- case SUN3_PAGE_TYPE_IO: printk (" io"); break;
- case SUN3_PAGE_TYPE_VME16: printk (" vme16"); break;
- case SUN3_PAGE_TYPE_VME32: printk (" vme32"); break;
+ case SUN3_PAGE_TYPE_MEMORY: pr_cont(" memory"); break;
+ case SUN3_PAGE_TYPE_IO: pr_cont(" io"); break;
+ case SUN3_PAGE_TYPE_VME16: pr_cont(" vme16"); break;
+ case SUN3_PAGE_TYPE_VME32: pr_cont(" vme32"); break;
}
- printk ("]\n");
+ pr_cont("]\n");
#else
/* Terse version. More likely to fit on a line. */
unsigned long val = pte_val (pte);
@@ -107,7 +110,7 @@ void print_pte (pte_t pte)
default: type = "unknown?"; break;
}
- printk (" pte=%08lx [%07lx %s %s]\n",
+ pr_cont(" pte=%08lx [%07lx %s %s]\n",
val, (val & SUN3_PAGE_PGNUM_MASK) << PAGE_SHIFT, flags, type);
#endif
}
@@ -115,14 +118,14 @@ void print_pte (pte_t pte)
/* Print the PTE value for a given virtual address. For debugging. */
void print_pte_vaddr (unsigned long vaddr)
{
- printk (" vaddr=%lx [%02lx]", vaddr, sun3_get_segmap (vaddr));
+ pr_cont(" vaddr=%lx [%02lx]", vaddr, sun3_get_segmap (vaddr));
print_pte (__pte (sun3_get_pte (vaddr)));
}
/*
* Initialise the MMU emulator.
*/
-void mmu_emu_init(unsigned long bootmem_end)
+void __init mmu_emu_init(unsigned long bootmem_end)
{
unsigned long seg, num;
int i,j;
@@ -152,7 +155,7 @@ void mmu_emu_init(unsigned long bootmem_end)
if(!pmeg_alloc[i]) {
#ifdef DEBUG_MMU_EMU
- printk("freed: ");
+ pr_info("freed:");
print_pte_vaddr (seg);
#endif
sun3_put_segmap(seg, SUN3_INVALID_PMEG);
@@ -164,7 +167,7 @@ void mmu_emu_init(unsigned long bootmem_end)
if (sun3_get_segmap (seg) != SUN3_INVALID_PMEG) {
#ifdef DEBUG_PROM_MAPS
for(i = 0; i < 16; i++) {
- printk ("mapped:");
+ pr_info("mapped:");
print_pte_vaddr (seg + (i*PAGE_SIZE));
break;
}
@@ -189,14 +192,13 @@ void mmu_emu_init(unsigned long bootmem_end)
for(seg = 0; seg < PAGE_OFFSET; seg += SUN3_PMEG_SIZE)
sun3_put_segmap(seg, SUN3_INVALID_PMEG);
- set_fs(MAKE_MM_SEG(3));
+ set_fc(3);
for(seg = 0; seg < 0x10000000; seg += SUN3_PMEG_SIZE) {
i = sun3_get_segmap(seg);
for(j = 1; j < CONTEXTS_NUM; j++)
(*(romvec->pv_setctxt))(j, (void *)seg, i);
}
- set_fs(KERNEL_DS);
-
+ set_fc(USER_DATA);
}
/* erase the mappings for a dead context. Uses the pg_dir for hints
@@ -206,32 +208,32 @@ void mmu_emu_init(unsigned long bootmem_end)
context for when they're cleared */
void clear_context(unsigned long context)
{
- unsigned char oldctx;
- unsigned long i;
+ unsigned char oldctx;
+ unsigned long i;
- if(context) {
- if(!ctx_alloc[context])
- panic("clear_context: context not allocated\n");
+ if (context) {
+ if (!ctx_alloc[context])
+ panic("%s: context not allocated\n", __func__);
- ctx_alloc[context]->context = SUN3_INVALID_CONTEXT;
- ctx_alloc[context] = (struct mm_struct *)0;
- ctx_avail++;
- }
+ ctx_alloc[context]->context = SUN3_INVALID_CONTEXT;
+ ctx_alloc[context] = (struct mm_struct *)0;
+ ctx_avail++;
+ }
- oldctx = sun3_get_context();
+ oldctx = sun3_get_context();
- sun3_put_context(context);
+ sun3_put_context(context);
- for(i = 0; i < SUN3_INVALID_PMEG; i++) {
- if((pmeg_ctx[i] == context) && (pmeg_alloc[i] == 1)) {
- sun3_put_segmap(pmeg_vaddr[i], SUN3_INVALID_PMEG);
- pmeg_ctx[i] = 0;
- pmeg_alloc[i] = 0;
- pmeg_vaddr[i] = 0;
- }
- }
+ for (i = 0; i < SUN3_INVALID_PMEG; i++) {
+ if ((pmeg_ctx[i] == context) && (pmeg_alloc[i] == 1)) {
+ sun3_put_segmap(pmeg_vaddr[i], SUN3_INVALID_PMEG);
+ pmeg_ctx[i] = 0;
+ pmeg_alloc[i] = 0;
+ pmeg_vaddr[i] = 0;
+ }
+ }
- sun3_put_context(oldctx);
+ sun3_put_context(oldctx);
}
/* gets an empty context. if full, kills the next context listed to
@@ -261,7 +263,7 @@ unsigned long get_free_context(struct mm_struct *mm)
}
// check to make sure one was really free...
if(new == CONTEXTS_NUM)
- panic("get_free_context: failed to find free context");
+ panic("%s: failed to find free context", __func__);
}
ctx_alloc[new] = mm;
@@ -292,8 +294,8 @@ inline void mmu_emu_map_pmeg (int context, int vaddr)
#ifdef DEBUG_MMU_EMU
-printk("mmu_emu_map_pmeg: pmeg %x to context %d vaddr %x\n",
- curr_pmeg, context, vaddr);
+ pr_info("mmu_emu_map_pmeg: pmeg %x to context %d vaddr %x\n",
+ curr_pmeg, context, vaddr);
#endif
/* Invalidate old mapping for the pmeg, if any */
@@ -369,22 +371,22 @@ int mmu_emu_handle_fault (unsigned long vaddr, int read_flag, int kernel_fault)
}
#ifdef DEBUG_MMU_EMU
- printk ("mmu_emu_handle_fault: vaddr=%lx type=%s crp=%p\n",
- vaddr, read_flag ? "read" : "write", crp);
+ pr_info("%s: vaddr=%lx type=%s crp=%px\n", __func__, vaddr,
+ str_read_write(read_flag), crp);
#endif
segment = (vaddr >> SUN3_PMEG_SIZE_BITS) & 0x7FF;
offset = (vaddr >> SUN3_PTE_SIZE_BITS) & 0xF;
#ifdef DEBUG_MMU_EMU
- printk ("mmu_emu_handle_fault: segment=%lx offset=%lx\n", segment, offset);
+ pr_info("%s: segment=%lx offset=%lx\n", __func__, segment, offset);
#endif
pte = (pte_t *) pgd_val (*(crp + segment));
//todo: next line should check for valid pmd properly.
if (!pte) {
-// printk ("mmu_emu_handle_fault: invalid pmd\n");
+// pr_info("mmu_emu_handle_fault: invalid pmd\n");
return 0;
}
@@ -416,9 +418,9 @@ int mmu_emu_handle_fault (unsigned long vaddr, int read_flag, int kernel_fault)
pte_val (*pte) |= SUN3_PAGE_ACCESSED;
#ifdef DEBUG_MMU_EMU
- printk ("seg:%d crp:%p ->", get_fs().seg, crp);
+ pr_info("seg:%ld crp:%px ->", get_fc(), crp);
print_pte_vaddr (vaddr);
- printk ("\n");
+ pr_cont("\n");
#endif
return 1;
generated by cgit (git 2.34.1) at 2025-12-25 09:32:33 +0000