sparc,leon: CONFIG_SPARC_LEON option and leon specific files.
The macro CONFIG_SPARC_LEON will shield, if undefined, the sun-sparc code from LEON specific code. In particular include/asm/leon.h will get empty through #ifdef and leon_kernel.c and leon_mm.c will not be compiled. Signed-off-by: Konrad Eisele <konrad@gaisler.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Este commit está contenido en:
Konrad Eisele
cometido por
David S. Miller
David S. Miller
padre
8abf919600
commit
5213a78029
260
arch/sparc/mm/leon_mm.c
Archivo normal
260
arch/sparc/mm/leon_mm.c
Archivo normal
@@ -0,0 +1,260 @@
|
||||
/*
|
||||
* linux/arch/sparc/mm/leon_m.c
|
||||
*
|
||||
* Copyright (C) 2004 Konrad Eisele (eiselekd@web.de, konrad@gaisler.com) Gaisler Research
|
||||
* Copyright (C) 2009 Daniel Hellstrom (daniel@gaisler.com) Aeroflex Gaisler AB
|
||||
* Copyright (C) 2009 Konrad Eisele (konrad@gaisler.com) Aeroflex Gaisler AB
|
||||
*
|
||||
* do srmmu probe in software
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/mm.h>
|
||||
#include <asm/asi.h>
|
||||
#include <asm/leon.h>
|
||||
#include <asm/tlbflush.h>
|
||||
|
||||
int leon_flush_during_switch = 1;
|
||||
int srmmu_swprobe_trace;
|
||||
|
||||
unsigned long srmmu_swprobe(unsigned long vaddr, unsigned long *paddr)
|
||||
{
|
||||
|
||||
unsigned int ctxtbl;
|
||||
unsigned int pgd, pmd, ped;
|
||||
unsigned int ptr;
|
||||
unsigned int lvl, pte, paddrbase;
|
||||
unsigned int ctx;
|
||||
unsigned int paddr_calc;
|
||||
|
||||
paddrbase = 0;
|
||||
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: trace on\n");
|
||||
|
||||
ctxtbl = srmmu_get_ctable_ptr();
|
||||
if (!(ctxtbl)) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: srmmu_get_ctable_ptr returned 0=>0\n");
|
||||
return 0;
|
||||
}
|
||||
if (!_pfn_valid(PFN(ctxtbl))) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO
|
||||
"swprobe: !_pfn_valid(%x)=>0\n",
|
||||
PFN(ctxtbl));
|
||||
return 0;
|
||||
}
|
||||
|
||||
ctx = srmmu_get_context();
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: --- ctx (%x) ---\n", ctx);
|
||||
|
||||
pgd = LEON_BYPASS_LOAD_PA(ctxtbl + (ctx * 4));
|
||||
|
||||
if (((pgd & SRMMU_ET_MASK) == SRMMU_ET_PTE)) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: pgd is entry level 3\n");
|
||||
lvl = 3;
|
||||
pte = pgd;
|
||||
paddrbase = pgd & _SRMMU_PTE_PMASK_LEON;
|
||||
goto ready;
|
||||
}
|
||||
if (((pgd & SRMMU_ET_MASK) != SRMMU_ET_PTD)) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: pgd is invalid => 0\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: --- pgd (%x) ---\n", pgd);
|
||||
|
||||
ptr = (pgd & SRMMU_PTD_PMASK) << 4;
|
||||
ptr += ((((vaddr) >> LEON_PGD_SH) & LEON_PGD_M) * 4);
|
||||
if (!_pfn_valid(PFN(ptr)))
|
||||
return 0;
|
||||
|
||||
pmd = LEON_BYPASS_LOAD_PA(ptr);
|
||||
if (((pmd & SRMMU_ET_MASK) == SRMMU_ET_PTE)) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: pmd is entry level 2\n");
|
||||
lvl = 2;
|
||||
pte = pmd;
|
||||
paddrbase = pmd & _SRMMU_PTE_PMASK_LEON;
|
||||
goto ready;
|
||||
}
|
||||
if (((pmd & SRMMU_ET_MASK) != SRMMU_ET_PTD)) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: pmd is invalid => 0\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: --- pmd (%x) ---\n", pmd);
|
||||
|
||||
ptr = (pmd & SRMMU_PTD_PMASK) << 4;
|
||||
ptr += (((vaddr >> LEON_PMD_SH) & LEON_PMD_M) * 4);
|
||||
if (!_pfn_valid(PFN(ptr))) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: !_pfn_valid(%x)=>0\n",
|
||||
PFN(ptr));
|
||||
return 0;
|
||||
}
|
||||
|
||||
ped = LEON_BYPASS_LOAD_PA(ptr);
|
||||
|
||||
if (((ped & SRMMU_ET_MASK) == SRMMU_ET_PTE)) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: ped is entry level 1\n");
|
||||
lvl = 1;
|
||||
pte = ped;
|
||||
paddrbase = ped & _SRMMU_PTE_PMASK_LEON;
|
||||
goto ready;
|
||||
}
|
||||
if (((ped & SRMMU_ET_MASK) != SRMMU_ET_PTD)) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: ped is invalid => 0\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: --- ped (%x) ---\n", ped);
|
||||
|
||||
ptr = (ped & SRMMU_PTD_PMASK) << 4;
|
||||
ptr += (((vaddr >> LEON_PTE_SH) & LEON_PTE_M) * 4);
|
||||
if (!_pfn_valid(PFN(ptr)))
|
||||
return 0;
|
||||
|
||||
ptr = LEON_BYPASS_LOAD_PA(ptr);
|
||||
if (((ptr & SRMMU_ET_MASK) == SRMMU_ET_PTE)) {
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: ptr is entry level 0\n");
|
||||
lvl = 0;
|
||||
pte = ptr;
|
||||
paddrbase = ptr & _SRMMU_PTE_PMASK_LEON;
|
||||
goto ready;
|
||||
}
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: ptr is invalid => 0\n");
|
||||
return 0;
|
||||
|
||||
ready:
|
||||
switch (lvl) {
|
||||
case 0:
|
||||
paddr_calc =
|
||||
(vaddr & ~(-1 << LEON_PTE_SH)) | ((pte & ~0xff) << 4);
|
||||
break;
|
||||
case 1:
|
||||
paddr_calc =
|
||||
(vaddr & ~(-1 << LEON_PMD_SH)) | ((pte & ~0xff) << 4);
|
||||
break;
|
||||
case 2:
|
||||
paddr_calc =
|
||||
(vaddr & ~(-1 << LEON_PGD_SH)) | ((pte & ~0xff) << 4);
|
||||
break;
|
||||
default:
|
||||
case 3:
|
||||
paddr_calc = vaddr;
|
||||
break;
|
||||
}
|
||||
if (srmmu_swprobe_trace)
|
||||
printk(KERN_INFO "swprobe: padde %x\n", paddr_calc);
|
||||
if (paddr)
|
||||
*paddr = paddr_calc;
|
||||
return paddrbase;
|
||||
}
|
||||
|
||||
void leon_flush_icache_all(void)
|
||||
{
|
||||
__asm__ __volatile__(" flush "); /*iflush*/
|
||||
}
|
||||
|
||||
void leon_flush_dcache_all(void)
|
||||
{
|
||||
__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t" : :
|
||||
"i"(ASI_LEON_DFLUSH) : "memory");
|
||||
}
|
||||
|
||||
void leon_flush_pcache_all(struct vm_area_struct *vma, unsigned long page)
|
||||
{
|
||||
if (vma->vm_flags & VM_EXEC)
|
||||
leon_flush_icache_all();
|
||||
leon_flush_dcache_all();
|
||||
}
|
||||
|
||||
void leon_flush_cache_all(void)
|
||||
{
|
||||
__asm__ __volatile__(" flush "); /*iflush*/
|
||||
__asm__ __volatile__("sta %%g0, [%%g0] %0\n\t" : :
|
||||
"i"(ASI_LEON_DFLUSH) : "memory");
|
||||
}
|
||||
|
||||
void leon_flush_tlb_all(void)
|
||||
{
|
||||
leon_flush_cache_all();
|
||||
__asm__ __volatile__("sta %%g0, [%0] %1\n\t" : : "r"(0x400),
|
||||
"i"(ASI_LEON_MMUFLUSH) : "memory");
|
||||
}
|
||||
|
||||
/* get all cache regs */
|
||||
void leon3_getCacheRegs(struct leon3_cacheregs *regs)
|
||||
{
|
||||
unsigned long ccr, iccr, dccr;
|
||||
|
||||
if (!regs)
|
||||
return;
|
||||
/* Get Cache regs from "Cache ASI" address 0x0, 0x8 and 0xC */
|
||||
__asm__ __volatile__("lda [%%g0] %3, %0\n\t"
|
||||
"mov 0x08, %%g1\n\t"
|
||||
"lda [%%g1] %3, %1\n\t"
|
||||
"mov 0x0c, %%g1\n\t"
|
||||
"lda [%%g1] %3, %2\n\t"
|
||||
: "=r"(ccr), "=r"(iccr), "=r"(dccr)
|
||||
/* output */
|
||||
: "i"(ASI_LEON_CACHEREGS) /* input */
|
||||
: "g1" /* clobber list */
|
||||
);
|
||||
regs->ccr = ccr;
|
||||
regs->iccr = iccr;
|
||||
regs->dccr = dccr;
|
||||
}
|
||||
|
||||
/* Due to virtual cache we need to check cache configuration if
|
||||
* it is possible to skip flushing in some cases.
|
||||
*
|
||||
* Leon2 and Leon3 differ in their way of telling cache information
|
||||
*
|
||||
*/
|
||||
int leon_flush_needed(void)
|
||||
{
|
||||
int flush_needed = -1;
|
||||
unsigned int ssize, sets;
|
||||
char *setStr[4] =
|
||||
{ "direct mapped", "2-way associative", "3-way associative",
|
||||
"4-way associative"
|
||||
};
|
||||
/* leon 3 */
|
||||
struct leon3_cacheregs cregs;
|
||||
leon3_getCacheRegs(&cregs);
|
||||
sets = (cregs.dccr & LEON3_XCCR_SETS_MASK) >> 24;
|
||||
/* (ssize=>realsize) 0=>1k, 1=>2k, 2=>4k, 3=>8k ... */
|
||||
ssize = 1 << ((cregs.dccr & LEON3_XCCR_SSIZE_MASK) >> 20);
|
||||
|
||||
printk(KERN_INFO "CACHE: %s cache, set size %dk\n",
|
||||
sets > 3 ? "unknown" : setStr[sets], ssize);
|
||||
if ((ssize <= (PAGE_SIZE / 1024)) && (sets == 0)) {
|
||||
/* Set Size <= Page size ==>
|
||||
flush on every context switch not needed. */
|
||||
flush_needed = 0;
|
||||
printk(KERN_INFO "CACHE: not flushing on every context switch\n");
|
||||
}
|
||||
return flush_needed;
|
||||
}
|
||||
|
||||
void leon_switch_mm(void)
|
||||
{
|
||||
flush_tlb_mm((void *)0);
|
||||
if (leon_flush_during_switch)
|
||||
leon_flush_cache_all();
|
||||
}
|
||||
Referencia en una nueva incidencia
Block a user