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/* $Id: pa20.c,v 1.1 1999/03/17 01:05:41 pjlahaie Exp $
*
* pa20.c: PA 2.0 specific mmu/cache code.
*
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/sgialib.h>
#include <asm/mmu_context.h>
extern unsigned long mips_tlb_entries;
/* page functions */
void pa20_clear_page(unsigned long page)
{
}
static void pa20_copy_page(unsigned long to, unsigned long from)
{
}
/* Cache operations. */
static inline void pa20_flush_cache_all(void) { }
static void pa20_flush_cache_mm(struct mm_struct *mm) { }
static void pa20_flush_cache_range(struct mm_struct *mm,
unsigned long start,
unsigned long end)
{
}
static void pa20_flush_cache_page(struct vm_area_struct *vma,
unsigned long page)
{
}
static void pa20_flush_page_to_ram(unsigned long page)
{
}
static void pa20_flush_cache_sigtramp(unsigned long page)
{
}
/* TLB operations. */
static inline void pa20_flush_tlb_all(void)
{
unsigned long flags;
int entry;
save_and_cli(flags);
/* Here we will need to flush all the TLBs */
restore_flags(flags);
}
static void pa20_flush_tlb_mm(struct mm_struct *mm)
{
/* This is what the MIPS does.. Is it the right thing for PA-RISC? */
if(mm == current->mm)
pa20_flush_tlb_all();
}
static void pa20_flush_tlb_range(struct mm_struct *mm, unsigned long start,
unsigned long end)
{
if(mm == current->mm)
pa20_flush_tlb_all();
}
static void pa20_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
{
if(vma->vm_mm == current->mm)
pa20_flush_tlb_all();
}
static void pa20_load_pgd(unsigned long pg_dir)
{
unsigned long flags;
/* We need to do the right thing here */
}
/*
* Initialize new page directory with pointers to invalid ptes
*/
static void pa20_pgd_init(unsigned long page)
{
unsigned long dummy1, dummy2;
}
static void pa20_update_mmu_cache(struct vm_area_struct * vma,
unsigned long address, pte_t pte)
{
pa20_flush_tlb_page(vma, address);
}
static void pa20_show_regs(struct pt_regs * regs)
{
/*
* Saved main processor registers
*/
printk("$0 : %08x %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
0, (unsigned long) regs->regs[1], (unsigned long) regs->regs[2],
(unsigned long) regs->regs[3], (unsigned long) regs->regs[4],
(unsigned long) regs->regs[5], (unsigned long) regs->regs[6],
(unsigned long) regs->regs[7]);
printk("$8 : %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
(unsigned long) regs->regs[8], (unsigned long) regs->regs[9],
(unsigned long) regs->regs[10], (unsigned long) regs->regs[11],
(unsigned long) regs->regs[12], (unsigned long) regs->regs[13],
(unsigned long) regs->regs[14], (unsigned long) regs->regs[15]);
printk("$16: %08lx %08lx %08lx %08lx %08lx %08lx %08lx %08lx\n",
(unsigned long) regs->regs[16], (unsigned long) regs->regs[17],
(unsigned long) regs->regs[18], (unsigned long) regs->regs[19],
(unsigned long) regs->regs[20], (unsigned long) regs->regs[21],
(unsigned long) regs->regs[22], (unsigned long) regs->regs[23]);
printk("$24: %08lx %08lx %08lx %08lx %08lx %08lx\n",
(unsigned long) regs->regs[24], (unsigned long) regs->regs[25],
(unsigned long) regs->regs[28], (unsigned long) regs->regs[29],
(unsigned long) regs->regs[30], (unsigned long) regs->regs[31]);
/*
* Saved cp0 registers
*/
printk("epc : %08lx %s\nStatus: %08x\nCause : %08x\n",
(unsigned long) regs->cp0_epc, print_tainted(),
(unsigned int) regs->cp0_status,
(unsigned int) regs->cp0_cause);
}
static int pa20_user_mode(struct pt_regs *regs)
{
/* Return user mode stuff?? */
}
__initfunc(void ld_mmu_pa20(void))
{
/* Taken directly from the MIPS arch.. Lots of bad things here */
clear_page = pa20_clear_page;
copy_page = pa20_copy_page;
flush_cache_all = pa20_flush_cache_all;
flush_cache_mm = pa20_flush_cache_mm;
flush_cache_range = pa20_flush_cache_range;
flush_cache_page = pa20_flush_cache_page;
flush_cache_sigtramp = pa20_flush_cache_sigtramp;
flush_page_to_ram = pa20_flush_page_to_ram;
flush_tlb_all = pa20_flush_tlb_all;
flush_tlb_mm = pa20_flush_tlb_mm;
flush_tlb_range = pa20_flush_tlb_range;
flush_tlb_page = pa20_flush_tlb_page;
pa20_asid_setup();
load_pgd = pa20_load_pgd;
pgd_init = pa20_pgd_init;
update_mmu_cache = pa20_update_mmu_cache;
show_regs = pa20_show_regs;
add_wired_entry = pa20_add_wired_entry;
user_mode = pa20_user_mode;
flush_tlb_all();
}
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