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/*
* Cache control for MicroBlaze cache memories
*
* Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2007-2009 PetaLogix
* Copyright (C) 2007 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
* archive for more details.
*/
#include <asm/cacheflush.h>
#include <linux/cache.h>
#include <asm/cpuinfo.h>
/* Exported functions */
void _enable_icache(void)
{
if (cpuinfo.use_icache) {
#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
__asm__ __volatile__ (" \
msrset r0, %0; \
nop; " \
: \
: "i" (MSR_ICE) \
: "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)
{
if (cpuinfo.use_icache) {
#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
__asm__ __volatile__ (" \
msrclr r0, %0; \
nop; " \
: \
: "i" (MSR_ICE) \
: "memory");
#else
__asm__ __volatile__ (" \
mfs r12, rmsr; \
nop; \
andi r12, r12, ~%0; \
mts rmsr, r12; \
nop; " \
: \
: "i" (MSR_ICE) \
: "memory", "r12");
#endif
}
}
void _invalidate_icache(unsigned int addr)
{
if (cpuinfo.use_icache) {
__asm__ __volatile__ (" \
wic %0, r0" \
: \
: "r" (addr));
}
}
void _enable_dcache(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) \
: "memory", "r12");
#endif
}
}
void _disable_dcache(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) \
: "memory", "r12");
#endif
}
void _invalidate_dcache(unsigned int addr)
{
__asm__ __volatile__ (" \
wdc %0, r0" \
: \
: "r" (addr));
}
void __invalidate_icache_all(void)
{
unsigned int i;
unsigned flags;
if (cpuinfo.use_icache) {
local_irq_save(flags);
__disable_icache();
/* 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)
__invalidate_icache(i);
__enable_icache();
local_irq_restore(flags);
}
}
void __invalidate_icache_range(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 - 1);
start &= align; /* Make sure we are aligned */
/* Push end up to the next cache line */
end = ((end & align) + cpuinfo.icache_line);
local_irq_save(flags);
__disable_icache();
for (i = start; i < end; i += cpuinfo.icache_line)
__invalidate_icache(i);
__enable_icache();
local_irq_restore(flags);
}
}
void __invalidate_icache_page(struct vm_area_struct *vma, struct page *page)
{
__invalidate_icache_all();
}
void __invalidate_icache_user_range(struct vm_area_struct *vma,
struct page *page, unsigned long adr,
int len)
{
__invalidate_icache_all();
}
void __invalidate_cache_sigtramp(unsigned long addr)
{
__invalidate_icache_range(addr, addr + 8);
}
void __invalidate_dcache_all(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)
__invalidate_dcache(i);
__enable_dcache();
local_irq_restore(flags);
}
}
void __invalidate_dcache_range(unsigned long start, unsigned long end)
{
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 - 1);
start &= align; /* Make sure we are aligned */
/* Push end up to the next cache line */
end = ((end & align) + cpuinfo.dcache_line);
local_irq_save(flags);
__disable_dcache();
for (i = start; i < end; i += cpuinfo.dcache_line)
__invalidate_dcache(i);
__enable_dcache();
local_irq_restore(flags);
}
}
void __invalidate_dcache_page(struct vm_area_struct *vma, struct page *page)
{
__invalidate_dcache_all();
}
void __invalidate_dcache_user_range(struct vm_area_struct *vma,
struct page *page, unsigned long adr,
int len)
{
__invalidate_dcache_all();
}
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