patch-2.4.22 linux-2.4.22/arch/mips64/mm/r5k-sc.c
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- Lines: 116
- Date:
1969-12-31 16:00:00.000000000 -0800
- Orig file:
linux-2.4.21/arch/mips64/mm/r5k-sc.c
- Orig date:
2002-11-28 15:53:10.000000000 -0800
diff -urN linux-2.4.21/arch/mips64/mm/r5k-sc.c linux-2.4.22/arch/mips64/mm/r5k-sc.c
@@ -1,115 +0,0 @@
-/*
- * Copyright (C) 1997, 2001 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/mipsregs.h>
-#include <asm/bcache.h>
-#include <asm/page.h>
-#include <asm/pgtable.h>
-#include <asm/system.h>
-#include <asm/mmu_context.h>
-#include <asm/r4kcacheops.h>
-
-/* Secondary cache size in bytes, if present. */
-static unsigned long scache_size;
-
-#define SC_LINE 32
-#define SC_PAGE (128*SC_LINE)
-
-#define cache_op(base,op) \
-__asm__ __volatile__(" \
- .set noreorder; \
- .set mips3; \
- cache %1, (%0); \
- .set mips0; \
- .set reorder" \
- : \
- : "r" (base), \
- "i" (op));
-
-static inline void blast_r5000_scache(void)
-{
- unsigned long start = KSEG0;
- unsigned long end = KSEG0 + scache_size;
-
- while(start < end) {
- cache_op(start, R5K_Page_Invalidate_S);
- start += SC_PAGE;
- }
-}
-
-static void r5k_dma_cache_inv_sc(unsigned long addr, unsigned long size)
-{
- unsigned long end, a;
-
- if (size >= scache_size) {
- blast_r5000_scache();
- return;
- }
-
- /* On the R5000 secondary cache we cannot
- * invalidate less than a page at a time.
- * The secondary cache is physically indexed, write-through.
- */
- a = addr & ~(SC_PAGE - 1);
- end = (addr + size - 1) & ~(SC_PAGE - 1);
- while (a <= end) {
- cache_op(a, R5K_Page_Invalidate_S);
- a += SC_PAGE;
- }
-}
-
-static void r5k_sc_enable(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- change_cp0_config(CONF_SE, CONF_SE);
- blast_r5000_scache();
- __restore_flags(flags);
-}
-
-static void r5k_sc_disable(void)
-{
- unsigned long flags;
-
- __save_and_cli(flags);
- blast_r5000_scache();
- change_cp0_config(CONF_SE, 0);
- __restore_flags(flags);
-}
-
-static inline int __init r5k_sc_probe(void)
-{
- unsigned long config = read_32bit_cp0_register(CP0_CONFIG);
-
- if(config & CONF_SC)
- return(0);
-
- scache_size = (512*1024) << ((config >> 20)&3);
-
- printk("R5000 SCACHE size %ldK, linesize 32 bytes.\n",
- scache_size >> 10);
-
- return 1;
-}
-
-struct bcache_ops r5k_sc_ops = {
- r5k_sc_enable,
- r5k_sc_disable,
- r5k_dma_cache_inv_sc,
- r5k_dma_cache_inv_sc
-};
-
-void __init r5k_sc_init(void)
-{
- if (r5k_sc_probe()) {
- r5k_sc_enable();
- bcops = &r5k_sc_ops;
- }
-}
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