patch-2.4.19 linux-2.4.19/arch/mips64/sgi-ip22/ip22-sc.c
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- Lines: 165
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
linux-2.4.18/arch/mips64/sgi-ip22/ip22-sc.c
- Orig date:
Sun Sep 9 10:43:02 2001
diff -urN linux-2.4.18/arch/mips64/sgi-ip22/ip22-sc.c linux-2.4.19/arch/mips64/sgi-ip22/ip22-sc.c
@@ -1,164 +0,0 @@
-/*
- * indy_sc.c: Indy cache management functions.
- *
- * Copyright (C) 1997 Ralf Baechle (ralf@gnu.org),
- * derived from r4xx0.c by David S. Miller (dm@engr.sgi.com).
- */
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-
-#include <asm/bcache.h>
-#include <asm/sgi/sgimc.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/bootinfo.h>
-#include <asm/mmu_context.h>
-
-/* Secondary cache size in bytes, if present. */
-static unsigned long scache_size;
-
-#undef DEBUG_CACHE
-
-#define SC_SIZE 0x00080000
-#define SC_LINE 32
-#define CI_MASK (SC_SIZE - SC_LINE)
-#define SC_INDEX(n) ((n) & CI_MASK)
-
-static inline void indy_sc_wipe(unsigned long first, unsigned long last)
-{
- __asm__ __volatile__(
- ".set\tnoreorder\n\t"
- "or\t%0, %4\t\t\t# first line to flush\n\t"
- "or\t%1, %4\t\t\t# last line to flush\n"
- "1:\tsw $0, 0(%0)\n\t"
- "bne\t%0, %1, 1b\n\t"
- "daddu\t%0, 32\n\t"
- ".set reorder"
- : "=r" (first), "=r" (last)
- : "0" (first), "1" (last), "r" (0x9000000080000000)
- : "$1");
-}
-
-static void indy_sc_wback_invalidate(unsigned long addr, unsigned long size)
-{
- unsigned long first_line, last_line;
- unsigned int flags;
-
-#ifdef DEBUG_CACHE
- printk("indy_sc_wback_invalidate[%08lx,%08lx]", addr, size);
-#endif
-
- if (!size)
- return;
-
- /* Which lines to flush? */
- first_line = SC_INDEX(addr);
- last_line = SC_INDEX(addr + size - 1);
-
- __save_and_cli(flags);
- if (first_line <= last_line) {
- indy_sc_wipe(first_line, last_line);
- goto out;
- }
-
- indy_sc_wipe(first_line, SC_SIZE - SC_LINE);
- indy_sc_wipe(0, last_line);
-out:
- __restore_flags(flags);
-}
-
-static void inline indy_sc_enable(void)
-{
-#ifdef DEBUG_CACHE
- printk("Enabling R4600 SCACHE\n");
-#endif
- *(volatile unsigned char *) 0x9000000080000000 = 0;
-}
-
-static void indy_sc_disable(void)
-{
-#ifdef DEBUG_CACHE
- printk("Disabling R4600 SCACHE\n");
-#endif
- *(volatile unsigned short *) 0x9000000080000000 = 0;
-}
-
-static inline __init int indy_sc_probe(void)
-{
- volatile u32 *cpu_control;
- unsigned short cmd = 0xc220;
- unsigned long data = 0;
- int i, n;
-
-#ifdef __MIPSEB__
- cpu_control = (volatile u32 *) KSEG1ADDR(0x1fa00034);
-#else
- cpu_control = (volatile u32 *) KSEG1ADDR(0x1fa00030);
-#endif
-#define DEASSERT(bit) (*(cpu_control) &= (~(bit)))
-#define ASSERT(bit) (*(cpu_control) |= (bit))
-#define DELAY for(n = 0; n < 100000; n++) __asm__ __volatile__("")
- DEASSERT(SGIMC_EEPROM_PRE);
- DEASSERT(SGIMC_EEPROM_SDATAO);
- DEASSERT(SGIMC_EEPROM_SECLOCK);
- DEASSERT(SGIMC_EEPROM_PRE);
- DELAY;
- ASSERT(SGIMC_EEPROM_CSEL); ASSERT(SGIMC_EEPROM_SECLOCK);
- for(i = 0; i < 11; i++) {
- if(cmd & (1<<15))
- ASSERT(SGIMC_EEPROM_SDATAO);
- else
- DEASSERT(SGIMC_EEPROM_SDATAO);
- DEASSERT(SGIMC_EEPROM_SECLOCK);
- ASSERT(SGIMC_EEPROM_SECLOCK);
- cmd <<= 1;
- }
- DEASSERT(SGIMC_EEPROM_SDATAO);
- for(i = 0; i < (sizeof(unsigned short) * 8); i++) {
- unsigned int tmp;
-
- DEASSERT(SGIMC_EEPROM_SECLOCK);
- DELAY;
- ASSERT(SGIMC_EEPROM_SECLOCK);
- DELAY;
- data <<= 1;
- tmp = *cpu_control;
- if(tmp & SGIMC_EEPROM_SDATAI)
- data |= 1;
- }
- DEASSERT(SGIMC_EEPROM_SECLOCK);
- DEASSERT(SGIMC_EEPROM_CSEL);
- ASSERT(SGIMC_EEPROM_PRE);
- ASSERT(SGIMC_EEPROM_SECLOCK);
-
- data <<= PAGE_SHIFT;
- if (data == 0)
- return 0;
-
- scache_size = data;
-
- printk("R4600/R5000 SCACHE size %ldK, linesize 32 bytes.\n",
- scache_size >> 10);
-
- return 1;
-}
-
-/* XXX Check with wje if the Indy caches can differenciate between
- writeback + invalidate and just invalidate. */
-static struct bcache_ops indy_sc_ops = {
- indy_sc_enable,
- indy_sc_disable,
- indy_sc_wback_invalidate,
- indy_sc_wback_invalidate
-};
-
-void __init indy_sc_init(void)
-{
- if (indy_sc_probe()) {
- indy_sc_enable();
- bcops = &indy_sc_ops;
- }
-}
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