/* Somebody depends on this; sigh... */
#include <linux/mm.h>
+/* Look at Documentation/cachetlb.txt */
+
/*
* Cache handling functions.
* Microblaze has a write-through data cache, meaning that the data cache
* instruction cache to make sure we don't fetch old, bad code.
*/
+/* struct cache, d=dcache, i=icache, fl = flush, iv = invalidate,
+ * suffix r = range */
+struct scache {
+ /* icache */
+ void (*ie)(void); /* enable */
+ void (*id)(void); /* disable */
+ void (*ifl)(void); /* flush */
+ void (*iflr)(unsigned long a, unsigned long b);
+ void (*iin)(void); /* invalidate */
+ void (*iinr)(unsigned long a, unsigned long b);
+ /* dcache */
+ void (*de)(void); /* enable */
+ void (*dd)(void); /* disable */
+ void (*dfl)(void); /* flush */
+ void (*dflr)(unsigned long a, unsigned long b);
+ void (*din)(void); /* invalidate */
+ void (*dinr)(unsigned long a, unsigned long b);
+};
+
+/* microblaze cache */
+extern struct scache *mbc;
+
+void microblaze_cache_init(void);
+
+#define enable_icache() mbc->ie();
+#define disable_icache() mbc->id();
+#define flush_icache() mbc->ifl();
+#define flush_icache_range(start, end) mbc->iflr(start, end);
+#define invalidate_icache() mbc->iin();
+#define invalidate_icache_range(start, end) mbc->iinr(start, end);
+
+
+#define flush_icache_user_range(vma, pg, adr, len) flush_icache();
+#define flush_icache_page(vma, pg) do { } while (0)
+
+#define enable_dcache() mbc->de();
+#define disable_dcache() mbc->dd();
/* FIXME for LL-temac driver */
-#define invalidate_dcache_range(start, end) \
- __invalidate_dcache_range(start, end)
-
-#define flush_cache_all() __invalidate_cache_all()
-#define flush_cache_mm(mm) do { } while (0)
-#define flush_cache_range(vma, start, end) __invalidate_cache_all()
-#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
+#define invalidate_dcache() mbc->din();
+#define invalidate_dcache_range(start, end) mbc->dinr(start, end);
+#define flush_dcache() mbc->dfl();
+#define flush_dcache_range(start, end) mbc->dflr(start, end);
-#define flush_dcache_range(start, end) __invalidate_dcache_range(start, end)
#define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0
+/* D-cache aliasing problem can't happen - cache is between MMU and ram */
#define flush_dcache_page(page) do { } while (0)
#define flush_dcache_mmap_lock(mapping) do { } while (0)
#define flush_dcache_mmap_unlock(mapping) do { } while (0)
-#define flush_icache_range(start, len) __invalidate_icache_range(start, len)
-#define flush_icache_page(vma, pg) do { } while (0)
-
-#ifndef CONFIG_MMU
-# define flush_icache_user_range(start, len) do { } while (0)
-#else
-# define flush_icache_user_range(vma, pg, adr, len) __invalidate_icache_all()
-
-# define flush_page_to_ram(page) do { } while (0)
-# define flush_icache() __invalidate_icache_all()
-# define flush_cache_sigtramp(vaddr) \
- __invalidate_icache_range(vaddr, vaddr + 8)
-
-# define flush_dcache_mmap_lock(mapping) do { } while (0)
-# define flush_dcache_mmap_unlock(mapping) do { } while (0)
+#define flush_cache_dup_mm(mm) do { } while (0)
+#define flush_cache_vmap(start, end) do { } while (0)
+#define flush_cache_vunmap(start, end) do { } while (0)
+#define flush_cache_mm(mm) do { } while (0)
+#define flush_cache_page(vma, vmaddr, pfn) do { } while (0)
-# define flush_cache_dup_mm(mm) do { } while (0)
+/* MS: kgdb code use this macro, wrong len with FLASH */
+#if 0
+#define flush_cache_range(vma, start, len) { \
+ flush_icache_range((unsigned) (start), (unsigned) (start) + (len)); \
+ flush_dcache_range((unsigned) (start), (unsigned) (start) + (len)); \
+}
#endif
-#define flush_cache_vmap(start, end) do { } while (0)
-#define flush_cache_vunmap(start, end) do { } while (0)
-
-
-void _enable_icache(void);
-void _disable_icache(void);
-void _invalidate_icache(unsigned int addr);
-
-#define __enable_icache() _enable_icache()
-#define __disable_icache() _disable_icache()
-#define __invalidate_icache(addr) _invalidate_icache(addr)
-
-void _enable_dcache(void);
-void _disable_dcache(void);
-void _invalidate_dcache(unsigned int addr);
-
-#define __enable_dcache() _enable_dcache()
-#define __disable_dcache() _disable_dcache()
-#define __invalidate_dcache(addr) _invalidate_dcache(addr)
-
-struct page;
-struct mm_struct;
-struct vm_area_struct;
-
-/* see arch/microblaze/kernel/cache.c */
-extern void __invalidate_icache_all(void);
-extern void __invalidate_icache_range(unsigned long start, unsigned long end);
-extern void __invalidate_icache_page(struct vm_area_struct *vma,
- struct page *page);
-extern void __invalidate_icache_user_range(struct vm_area_struct *vma,
- struct page *page,
- unsigned long adr, int len);
-extern void __invalidate_cache_sigtramp(unsigned long addr);
-
-extern void __invalidate_dcache_all(void);
-extern void __invalidate_dcache_range(unsigned long start, unsigned long end);
-extern void __invalidate_dcache_page(struct vm_area_struct *vma,
- struct page *page);
-extern void __invalidate_dcache_user_range(struct vm_area_struct *vma,
- struct page *page,
- unsigned long adr, int len);
-
-extern inline void __invalidate_cache_all(void)
-{
- __invalidate_icache_all();
- __invalidate_dcache_all();
-}
+#define flush_cache_range(vma, start, len) do { } while (0)
-#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
-do { memcpy((dst), (src), (len)); \
- flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+ memcpy((dst), (src), (len)); \
+ flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \
} while (0)
-#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
- memcpy((dst), (src), (len))
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+ memcpy((dst), (src), (len)); \
+} while (0)
#endif /* _ASM_MICROBLAZE_CACHEFLUSH_H */
*
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2007-2009 PetaLogix
- * Copyright (C) 2007 John Williams <john.williams@petalogix.com>
+ * Copyright (C) 2007-2009 John Williams <john.williams@petalogix.com>
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file COPYING in the main directory of this
#include <asm/cacheflush.h>
#include <linux/cache.h>
#include <asm/cpuinfo.h>
+#include <asm/pvr.h>
-/* Exported functions */
+static inline void __invalidate_flush_icache(unsigned int addr)
+{
+ __asm__ __volatile__ ("wic %0, r0;" \
+ : : "r" (addr));
+}
+
+static inline void __flush_dcache(unsigned int addr)
+{
+ __asm__ __volatile__ ("wdc.flush %0, r0;" \
+ : : "r" (addr));
+}
+
+static inline void __invalidate_dcache(unsigned int baseaddr,
+ unsigned int offset)
+{
+ __asm__ __volatile__ ("wdc.clear %0, %1;" \
+ : : "r" (baseaddr), "r" (offset));
+}
-void _enable_icache(void)
+static inline void __enable_icache_msr(void)
{
- if (cpuinfo.use_icache) {
-#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
- __asm__ __volatile__ (" \
- msrset r0, %0; \
- nop; " \
- : \
- : "i" (MSR_ICE) \
+ __asm__ __volatile__ (" msrset r0, %0; \
+ nop; " \
+ : : "i" (MSR_ICE) : "memory");
+}
+
+static inline void __disable_icache_msr(void)
+{
+ __asm__ __volatile__ (" msrclr r0, %0; \
+ nop; " \
+ : : "i" (MSR_ICE) : "memory");
+}
+
+static inline void __enable_dcache_msr(void)
+{
+ __asm__ __volatile__ (" msrset r0, %0; \
+ nop; " \
+ : \
+ : "i" (MSR_DCE) \
: "memory");
-#else
- __asm__ __volatile__ (" \
- mfs r12, rmsr; \
- nop; \
- ori r12, r12, %0; \
- mts rmsr, r12; \
- nop; " \
- : \
- : "i" (MSR_ICE) \
- : "memory", "r12");
-#endif
- }
}
-void _disable_icache(void)
+static inline void __disable_dcache_msr(void)
{
- if (cpuinfo.use_icache) {
-#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
- __asm__ __volatile__ (" \
- msrclr r0, %0; \
- nop; " \
- : \
- : "i" (MSR_ICE) \
+ __asm__ __volatile__ (" msrclr r0, %0; \
+ nop; " \
+ : \
+ : "i" (MSR_DCE) \
: "memory");
-#else
- __asm__ __volatile__ (" \
- mfs r12, rmsr; \
- nop; \
- andi r12, r12, ~%0; \
- mts rmsr, r12; \
- nop; " \
- : \
- : "i" (MSR_ICE) \
+}
+
+static inline void __enable_icache_nomsr(void)
+{
+ __asm__ __volatile__ (" mfs r12, rmsr; \
+ nop; \
+ ori r12, r12, %0; \
+ mts rmsr, r12; \
+ nop; " \
+ : \
+ : "i" (MSR_ICE) \
: "memory", "r12");
-#endif
- }
}
-void _invalidate_icache(unsigned int addr)
+static inline void __disable_icache_nomsr(void)
{
- if (cpuinfo.use_icache) {
- __asm__ __volatile__ (" \
- wic %0, r0" \
- : \
- : "r" (addr));
- }
+ __asm__ __volatile__ (" mfs r12, rmsr; \
+ nop; \
+ andi r12, r12, ~%0; \
+ mts rmsr, r12; \
+ nop; " \
+ : \
+ : "i" (MSR_ICE) \
+ : "memory", "r12");
}
-void _enable_dcache(void)
+static inline void __enable_dcache_nomsr(void)
{
- if (cpuinfo.use_dcache) {
-#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
- __asm__ __volatile__ (" \
- msrset r0, %0; \
- nop; " \
- : \
- : "i" (MSR_DCE) \
- : "memory");
-#else
- __asm__ __volatile__ (" \
- mfs r12, rmsr; \
- nop; \
- ori r12, r12, %0; \
- mts rmsr, r12; \
- nop; " \
- : \
- : "i" (MSR_DCE) \
+ __asm__ __volatile__ (" mfs r12, rmsr; \
+ nop; \
+ ori r12, r12, %0; \
+ mts rmsr, r12; \
+ nop; " \
+ : \
+ : "i" (MSR_DCE) \
: "memory", "r12");
-#endif
- }
}
-void _disable_dcache(void)
+static inline void __disable_dcache_nomsr(void)
{
-#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
- __asm__ __volatile__ (" \
- msrclr r0, %0; \
- nop; " \
- : \
- : "i" (MSR_DCE) \
- : "memory");
-#else
- __asm__ __volatile__ (" \
- mfs r12, rmsr; \
- nop; \
- andi r12, r12, ~%0; \
- mts rmsr, r12; \
- nop; " \
- : \
- : "i" (MSR_DCE) \
+ __asm__ __volatile__ (" mfs r12, rmsr; \
+ nop; \
+ andi r12, r12, ~%0; \
+ mts rmsr, r12; \
+ nop; " \
+ : \
+ : "i" (MSR_DCE) \
: "memory", "r12");
-#endif
}
-void _invalidate_dcache(unsigned int addr)
+
+/* Helper macro for computing the limits of cache range loops */
+#define CACHE_LOOP_LIMITS(start, end, cache_line_length, cache_size) \
+do { \
+ int align = ~(cache_line_length - 1); \
+ end = min(start + cache_size, end); \
+ start &= align; \
+ end = ((end & align) + cache_line_length); \
+} while (0);
+
+/*
+ * Helper macro to loop over the specified cache_size/line_length and
+ * execute 'op' on that cacheline
+ */
+#define CACHE_ALL_LOOP(cache_size, line_length, op) \
+do { \
+ unsigned int len = cache_size; \
+ int step = -line_length; \
+ BUG_ON(step >= 0); \
+ \
+ __asm__ __volatile__ (" 1: " #op " %0, r0; \
+ bgtid %0, 1b; \
+ addk %0, %0, %1; \
+ " : : "r" (len), "r" (step) \
+ : "memory"); \
+} while (0);
+
+
+#define CACHE_ALL_LOOP2(cache_size, line_length, op) \
+do { \
+ unsigned int len = cache_size; \
+ int step = -line_length; \
+ BUG_ON(step >= 0); \
+ \
+ __asm__ __volatile__ (" 1: " #op " r0, %0; \
+ bgtid %0, 1b; \
+ addk %0, %0, %1; \
+ " : : "r" (len), "r" (step) \
+ : "memory"); \
+} while (0);
+
+/* for wdc.flush/clear */
+#define CACHE_RANGE_LOOP_2(start, end, line_length, op) \
+do { \
+ int step = -line_length; \
+ int count = end - start; \
+ BUG_ON(count <= 0); \
+ \
+ __asm__ __volatile__ (" 1: " #op " %0, %1; \
+ bgtid %1, 1b; \
+ addk %1, %1, %2; \
+ " : : "r" (start), "r" (count), \
+ "r" (step) : "memory"); \
+} while (0);
+
+/* It is used only first parameter for OP - for wic, wdc */
+#define CACHE_RANGE_LOOP_1(start, end, line_length, op) \
+do { \
+ int step = -line_length; \
+ int count = end - start; \
+ BUG_ON(count <= 0); \
+ \
+ __asm__ __volatile__ (" 1: addk %0, %0, %1; \
+ " #op " %0, r0; \
+ bgtid %1, 1b; \
+ addk %1, %1, %2; \
+ " : : "r" (start), "r" (count), \
+ "r" (step) : "memory"); \
+} while (0);
+
+static void __flush_icache_range_msr_irq(unsigned long start, unsigned long end)
{
- __asm__ __volatile__ (" \
- wdc %0, r0" \
- : \
- : "r" (addr));
+ unsigned long flags;
+
+ pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
+ (unsigned int)start, (unsigned int) end);
+
+ CACHE_LOOP_LIMITS(start, end,
+ cpuinfo.icache_line_length, cpuinfo.icache_size);
+
+ local_irq_save(flags);
+ __disable_icache_msr();
+
+ CACHE_RANGE_LOOP_1(start, end, cpuinfo.icache_line_length, wic);
+
+ __enable_icache_msr();
+ local_irq_restore(flags);
}
-void __invalidate_icache_all(void)
+static void __flush_icache_range_nomsr_irq(unsigned long start,
+ unsigned long end)
{
- unsigned int i;
- unsigned flags;
+ unsigned long flags;
- if (cpuinfo.use_icache) {
- local_irq_save(flags);
- __disable_icache();
+ pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
+ (unsigned int)start, (unsigned int) end);
- /* Just loop through cache size and invalidate, no need to add
- CACHE_BASE address */
- for (i = 0; i < cpuinfo.icache_size;
- i += cpuinfo.icache_line_length)
- __invalidate_icache(i);
+ CACHE_LOOP_LIMITS(start, end,
+ cpuinfo.icache_line_length, cpuinfo.icache_size);
- __enable_icache();
- local_irq_restore(flags);
- }
+ local_irq_save(flags);
+ __disable_icache_nomsr();
+
+ CACHE_RANGE_LOOP_1(start, end, cpuinfo.icache_line_length, wic);
+
+ __enable_icache_nomsr();
+ local_irq_restore(flags);
}
-void __invalidate_icache_range(unsigned long start, unsigned long end)
+static void __flush_icache_range_noirq(unsigned long start,
+ unsigned long end)
{
- unsigned int i;
- unsigned flags;
- unsigned int align;
-
- if (cpuinfo.use_icache) {
- /*
- * No need to cover entire cache range,
- * just cover cache footprint
- */
- end = min(start + cpuinfo.icache_size, end);
- align = ~(cpuinfo.icache_line_length - 1);
- start &= align; /* Make sure we are aligned */
- /* Push end up to the next cache line */
- end = ((end & align) + cpuinfo.icache_line_length);
-
- local_irq_save(flags);
- __disable_icache();
-
- for (i = start; i < end; i += cpuinfo.icache_line_length)
- __invalidate_icache(i);
-
- __enable_icache();
- local_irq_restore(flags);
- }
+ pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
+ (unsigned int)start, (unsigned int) end);
+
+ CACHE_LOOP_LIMITS(start, end,
+ cpuinfo.icache_line_length, cpuinfo.icache_size);
+ CACHE_RANGE_LOOP_1(start, end, cpuinfo.icache_line_length, wic);
+}
+
+static void __flush_icache_all_msr_irq(void)
+{
+ unsigned long flags;
+
+ pr_debug("%s\n", __func__);
+
+ local_irq_save(flags);
+ __disable_icache_msr();
+
+ CACHE_ALL_LOOP(cpuinfo.icache_size, cpuinfo.icache_line_length, wic);
+
+ __enable_icache_msr();
+ local_irq_restore(flags);
+}
+
+static void __flush_icache_all_nomsr_irq(void)
+{
+ unsigned long flags;
+
+ pr_debug("%s\n", __func__);
+
+ local_irq_save(flags);
+ __disable_icache_nomsr();
+
+ CACHE_ALL_LOOP(cpuinfo.icache_size, cpuinfo.icache_line_length, wic);
+
+ __enable_icache_nomsr();
+ local_irq_restore(flags);
}
-void __invalidate_icache_page(struct vm_area_struct *vma, struct page *page)
+static void __flush_icache_all_noirq(void)
{
- __invalidate_icache_all();
+ pr_debug("%s\n", __func__);
+ CACHE_ALL_LOOP(cpuinfo.icache_size, cpuinfo.icache_line_length, wic);
}
-void __invalidate_icache_user_range(struct vm_area_struct *vma,
- struct page *page, unsigned long adr,
- int len)
+static void __invalidate_dcache_all_msr_irq(void)
{
- __invalidate_icache_all();
+ unsigned long flags;
+
+ pr_debug("%s\n", __func__);
+
+ local_irq_save(flags);
+ __disable_dcache_msr();
+
+ CACHE_ALL_LOOP(cpuinfo.dcache_size, cpuinfo.dcache_line_length, wdc);
+
+ __enable_dcache_msr();
+ local_irq_restore(flags);
}
-void __invalidate_cache_sigtramp(unsigned long addr)
+static void __invalidate_dcache_all_nomsr_irq(void)
{
- __invalidate_icache_range(addr, addr + 8);
+ unsigned long flags;
+
+ pr_debug("%s\n", __func__);
+
+ local_irq_save(flags);
+ __disable_dcache_nomsr();
+
+ CACHE_ALL_LOOP(cpuinfo.dcache_size, cpuinfo.dcache_line_length, wdc);
+
+ __enable_dcache_nomsr();
+ local_irq_restore(flags);
}
-void __invalidate_dcache_all(void)
+static void __invalidate_dcache_all_noirq_wt(void)
{
- unsigned int i;
- unsigned flags;
-
- if (cpuinfo.use_dcache) {
- local_irq_save(flags);
- __disable_dcache();
-
- /*
- * Just loop through cache size and invalidate,
- * no need to add CACHE_BASE address
- */
- for (i = 0; i < cpuinfo.dcache_size;
- i += cpuinfo.dcache_line_length)
- __invalidate_dcache(i);
-
- __enable_dcache();
- local_irq_restore(flags);
- }
+ pr_debug("%s\n", __func__);
+ CACHE_ALL_LOOP(cpuinfo.dcache_size, cpuinfo.dcache_line_length, wdc)
}
-void __invalidate_dcache_range(unsigned long start, unsigned long end)
+/* FIXME this is weird - should be only wdc but not work
+ * MS: I am getting bus errors and other weird things */
+static void __invalidate_dcache_all_wb(void)
{
+ pr_debug("%s\n", __func__);
+ CACHE_ALL_LOOP2(cpuinfo.dcache_size, cpuinfo.dcache_line_length,
+ wdc.clear)
+
+#if 0
unsigned int i;
- unsigned flags;
- unsigned int align;
-
- if (cpuinfo.use_dcache) {
- /*
- * No need to cover entire cache range,
- * just cover cache footprint
- */
- end = min(start + cpuinfo.dcache_size, end);
- align = ~(cpuinfo.dcache_line_length - 1);
- start &= align; /* Make sure we are aligned */
- /* Push end up to the next cache line */
- end = ((end & align) + cpuinfo.dcache_line_length);
- local_irq_save(flags);
- __disable_dcache();
-
- for (i = start; i < end; i += cpuinfo.dcache_line_length)
- __invalidate_dcache(i);
-
- __enable_dcache();
- local_irq_restore(flags);
- }
+
+ pr_debug("%s\n", __func__);
+
+ /* Just loop through cache size and invalidate it */
+ for (i = 0; i < cpuinfo.dcache_size; i += cpuinfo.dcache_line_length)
+ __invalidate_dcache(0, i);
+#endif
+}
+
+static void __invalidate_dcache_range_wb(unsigned long start,
+ unsigned long end)
+{
+ pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
+ (unsigned int)start, (unsigned int) end);
+
+ CACHE_LOOP_LIMITS(start, end,
+ cpuinfo.dcache_line_length, cpuinfo.dcache_size);
+ CACHE_RANGE_LOOP_2(start, end, cpuinfo.dcache_line_length, wdc.clear);
+}
+
+static void __invalidate_dcache_range_nomsr_wt(unsigned long start,
+ unsigned long end)
+{
+ pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
+ (unsigned int)start, (unsigned int) end);
+ CACHE_LOOP_LIMITS(start, end,
+ cpuinfo.dcache_line_length, cpuinfo.dcache_size);
+
+ CACHE_RANGE_LOOP_1(start, end, cpuinfo.dcache_line_length, wdc);
}
-void __invalidate_dcache_page(struct vm_area_struct *vma, struct page *page)
+static void __invalidate_dcache_range_msr_irq_wt(unsigned long start,
+ unsigned long end)
{
- __invalidate_dcache_all();
+ unsigned long flags;
+
+ pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
+ (unsigned int)start, (unsigned int) end);
+ CACHE_LOOP_LIMITS(start, end,
+ cpuinfo.dcache_line_length, cpuinfo.dcache_size);
+
+ local_irq_save(flags);
+ __disable_dcache_msr();
+
+ CACHE_RANGE_LOOP_1(start, end, cpuinfo.dcache_line_length, wdc);
+
+ __enable_dcache_msr();
+ local_irq_restore(flags);
+}
+
+static void __invalidate_dcache_range_nomsr_irq(unsigned long start,
+ unsigned long end)
+{
+ unsigned long flags;
+
+ pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
+ (unsigned int)start, (unsigned int) end);
+
+ CACHE_LOOP_LIMITS(start, end,
+ cpuinfo.dcache_line_length, cpuinfo.dcache_size);
+
+ local_irq_save(flags);
+ __disable_dcache_nomsr();
+
+ CACHE_RANGE_LOOP_1(start, end, cpuinfo.dcache_line_length, wdc);
+
+ __enable_dcache_nomsr();
+ local_irq_restore(flags);
+}
+
+static void __flush_dcache_all_wb(void)
+{
+ pr_debug("%s\n", __func__);
+ CACHE_ALL_LOOP(cpuinfo.dcache_size, cpuinfo.dcache_line_length,
+ wdc.flush);
}
-void __invalidate_dcache_user_range(struct vm_area_struct *vma,
- struct page *page, unsigned long adr,
- int len)
+static void __flush_dcache_range_wb(unsigned long start, unsigned long end)
{
- __invalidate_dcache_all();
+ pr_debug("%s: start 0x%x, end 0x%x\n", __func__,
+ (unsigned int)start, (unsigned int) end);
+
+ CACHE_LOOP_LIMITS(start, end,
+ cpuinfo.dcache_line_length, cpuinfo.dcache_size);
+ CACHE_RANGE_LOOP_2(start, end, cpuinfo.dcache_line_length, wdc.flush);
+}
+
+/* struct for wb caches and for wt caches */
+struct scache *mbc;
+
+/* new wb cache model */
+const struct scache wb_msr = {
+ .ie = __enable_icache_msr,
+ .id = __disable_icache_msr,
+ .ifl = __flush_icache_all_noirq,
+ .iflr = __flush_icache_range_noirq,
+ .iin = __flush_icache_all_noirq,
+ .iinr = __flush_icache_range_noirq,
+ .de = __enable_dcache_msr,
+ .dd = __disable_dcache_msr,
+ .dfl = __flush_dcache_all_wb,
+ .dflr = __flush_dcache_range_wb,
+ .din = __invalidate_dcache_all_wb,
+ .dinr = __invalidate_dcache_range_wb,
+};
+
+/* There is only difference in ie, id, de, dd functions */
+const struct scache wb_nomsr = {
+ .ie = __enable_icache_nomsr,
+ .id = __disable_icache_nomsr,
+ .ifl = __flush_icache_all_noirq,
+ .iflr = __flush_icache_range_noirq,
+ .iin = __flush_icache_all_noirq,
+ .iinr = __flush_icache_range_noirq,
+ .de = __enable_dcache_nomsr,
+ .dd = __disable_dcache_nomsr,
+ .dfl = __flush_dcache_all_wb,
+ .dflr = __flush_dcache_range_wb,
+ .din = __invalidate_dcache_all_wb,
+ .dinr = __invalidate_dcache_range_wb,
+};
+
+/* Old wt cache model with disabling irq and turn off cache */
+const struct scache wt_msr = {
+ .ie = __enable_icache_msr,
+ .id = __disable_icache_msr,
+ .ifl = __flush_icache_all_msr_irq,
+ .iflr = __flush_icache_range_msr_irq,
+ .iin = __flush_icache_all_msr_irq,
+ .iinr = __flush_icache_range_msr_irq,
+ .de = __enable_dcache_msr,
+ .dd = __disable_dcache_msr,
+ .dfl = __invalidate_dcache_all_msr_irq,
+ .dflr = __invalidate_dcache_range_msr_irq_wt,
+ .din = __invalidate_dcache_all_msr_irq,
+ .dinr = __invalidate_dcache_range_msr_irq_wt,
+};
+
+const struct scache wt_nomsr = {
+ .ie = __enable_icache_nomsr,
+ .id = __disable_icache_nomsr,
+ .ifl = __flush_icache_all_nomsr_irq,
+ .iflr = __flush_icache_range_nomsr_irq,
+ .iin = __flush_icache_all_nomsr_irq,
+ .iinr = __flush_icache_range_nomsr_irq,
+ .de = __enable_dcache_nomsr,
+ .dd = __disable_dcache_nomsr,
+ .dfl = __invalidate_dcache_all_nomsr_irq,
+ .dflr = __invalidate_dcache_range_nomsr_irq,
+ .din = __invalidate_dcache_all_nomsr_irq,
+ .dinr = __invalidate_dcache_range_nomsr_irq,
+};
+
+/* New wt cache model for newer Microblaze versions */
+const struct scache wt_msr_noirq = {
+ .ie = __enable_icache_msr,
+ .id = __disable_icache_msr,
+ .ifl = __flush_icache_all_noirq,
+ .iflr = __flush_icache_range_noirq,
+ .iin = __flush_icache_all_noirq,
+ .iinr = __flush_icache_range_noirq,
+ .de = __enable_dcache_msr,
+ .dd = __disable_dcache_msr,
+ .dfl = __invalidate_dcache_all_noirq_wt,
+ .dflr = __invalidate_dcache_range_nomsr_wt,
+ .din = __invalidate_dcache_all_noirq_wt,
+ .dinr = __invalidate_dcache_range_nomsr_wt,
+};
+
+const struct scache wt_nomsr_noirq = {
+ .ie = __enable_icache_nomsr,
+ .id = __disable_icache_nomsr,
+ .ifl = __flush_icache_all_noirq,
+ .iflr = __flush_icache_range_noirq,
+ .iin = __flush_icache_all_noirq,
+ .iinr = __flush_icache_range_noirq,
+ .de = __enable_dcache_nomsr,
+ .dd = __disable_dcache_nomsr,
+ .dfl = __invalidate_dcache_all_noirq_wt,
+ .dflr = __invalidate_dcache_range_nomsr_wt,
+ .din = __invalidate_dcache_all_noirq_wt,
+ .dinr = __invalidate_dcache_range_nomsr_wt,
+};
+
+/* CPU version code for 7.20.c - see arch/microblaze/kernel/cpu/cpuinfo.c */
+#define CPUVER_7_20_A 0x0c
+#define CPUVER_7_20_D 0x0f
+
+#define INFO(s) printk(KERN_INFO "cache: " s " \n");
+
+void microblaze_cache_init(void)
+{
+ if (cpuinfo.use_instr & PVR2_USE_MSR_INSTR) {
+ if (cpuinfo.dcache_wb) {
+ INFO("wb_msr");
+ mbc = (struct scache *)&wb_msr;
+ if (cpuinfo.ver_code < CPUVER_7_20_D) {
+ /* MS: problem with signal handling - hw bug */
+ INFO("WB won't work properly");
+ }
+ } else {
+ if (cpuinfo.ver_code >= CPUVER_7_20_A) {
+ INFO("wt_msr_noirq");
+ mbc = (struct scache *)&wt_msr_noirq;
+ } else {
+ INFO("wt_msr");
+ mbc = (struct scache *)&wt_msr;
+ }
+ }
+ } else {
+ if (cpuinfo.dcache_wb) {
+ INFO("wb_nomsr");
+ mbc = (struct scache *)&wb_nomsr;
+ if (cpuinfo.ver_code < CPUVER_7_20_D) {
+ /* MS: problem with signal handling - hw bug */
+ INFO("WB won't work properly");
+ }
+ } else {
+ if (cpuinfo.ver_code >= CPUVER_7_20_A) {
+ INFO("wt_nomsr_noirq");
+ mbc = (struct scache *)&wt_nomsr_noirq;
+ } else {
+ INFO("wt_nomsr");
+ mbc = (struct scache *)&wt_nomsr;
+ }
+ }
+ }
}
projects / kernel.git / commitdiff