patch-2.4.19 linux-2.4.19/arch/mips64/sgi-ip22/ip22-sc.c

• 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;
-	}
-}