+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2003
* Wolfgang Denk, DENX Software Engineering, <wd@denx.de>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <cpu_func.h>
#include <asm/cacheops.h>
+#ifdef CONFIG_MIPS_L2_CACHE
+#include <asm/cm.h>
+#endif
+#include <asm/io.h>
#include <asm/mipsregs.h>
+#include <asm/system.h>
-static inline unsigned long icache_line_size(void)
+DECLARE_GLOBAL_DATA_PTR;
+
+static void probe_l2(void)
{
- unsigned long conf1, il;
+#ifdef CONFIG_MIPS_L2_CACHE
+ unsigned long conf2, sl;
+ bool l2c = false;
+
+ if (!(read_c0_config1() & MIPS_CONF_M))
+ return;
+
+ conf2 = read_c0_config2();
- if (!config_enabled(CONFIG_SYS_CACHE_SIZE_AUTO))
- return CONFIG_SYS_ICACHE_LINE_SIZE;
+ if (__mips_isa_rev >= 6) {
+ l2c = conf2 & MIPS_CONF_M;
+ if (l2c)
+ l2c = read_c0_config3() & MIPS_CONF_M;
+ if (l2c)
+ l2c = read_c0_config4() & MIPS_CONF_M;
+ if (l2c)
+ l2c = read_c0_config5() & MIPS_CONF5_L2C;
+ }
+
+ if (l2c && config_enabled(CONFIG_MIPS_CM)) {
+ gd->arch.l2_line_size = mips_cm_l2_line_size();
+ } else if (l2c) {
+ /* We don't know how to retrieve L2 config on this system */
+ BUG();
+ } else {
+ sl = (conf2 & MIPS_CONF2_SL) >> MIPS_CONF2_SL_SHF;
+ gd->arch.l2_line_size = sl ? (2 << sl) : 0;
+ }
+#endif
+}
+
+void mips_cache_probe(void)
+{
+#ifdef CONFIG_SYS_CACHE_SIZE_AUTO
+ unsigned long conf1, il, dl;
conf1 = read_c0_config1();
+
il = (conf1 & MIPS_CONF1_IL) >> MIPS_CONF1_IL_SHF;
- if (!il)
- return 0;
- return 2 << il;
+ dl = (conf1 & MIPS_CONF1_DL) >> MIPS_CONF1_DL_SHF;
+
+ gd->arch.l1i_line_size = il ? (2 << il) : 0;
+ gd->arch.l1d_line_size = dl ? (2 << dl) : 0;
+#endif
+ probe_l2();
}
-static inline unsigned long dcache_line_size(void)
+static inline unsigned long icache_line_size(void)
{
- unsigned long conf1, dl;
+#ifdef CONFIG_SYS_CACHE_SIZE_AUTO
+ return gd->arch.l1i_line_size;
+#else
+ return CONFIG_SYS_ICACHE_LINE_SIZE;
+#endif
+}
- if (!config_enabled(CONFIG_SYS_CACHE_SIZE_AUTO))
- return CONFIG_SYS_DCACHE_LINE_SIZE;
+static inline unsigned long dcache_line_size(void)
+{
+#ifdef CONFIG_SYS_CACHE_SIZE_AUTO
+ return gd->arch.l1d_line_size;
+#else
+ return CONFIG_SYS_DCACHE_LINE_SIZE;
+#endif
+}
- conf1 = read_c0_config1();
- dl = (conf1 & MIPS_CONF1_DL) >> MIPS_CONF1_DL_SHF;
- if (!dl)
- return 0;
- return 2 << dl;
+static inline unsigned long scache_line_size(void)
+{
+#ifdef CONFIG_MIPS_L2_CACHE
+ return gd->arch.l2_line_size;
+#else
+ return CONFIG_SYS_SCACHE_LINE_SIZE;
+#endif
}
#define cache_loop(start, end, lsize, ops...) do { \
const unsigned int cache_ops[] = { ops }; \
unsigned int i; \
\
+ if (!lsize) \
+ break; \
+ \
for (; addr <= aend; addr += lsize) { \
for (i = 0; i < ARRAY_SIZE(cache_ops); i++) \
mips_cache(cache_ops[i], addr); \
{
unsigned long ilsize = icache_line_size();
unsigned long dlsize = dcache_line_size();
+ unsigned long slsize = scache_line_size();
/* aend will be miscalculated when size is zero, so we return here */
if (size == 0)
return;
- if (ilsize == dlsize) {
+ if ((ilsize == dlsize) && !slsize) {
/* flush I-cache & D-cache simultaneously */
cache_loop(start_addr, start_addr + size, ilsize,
HIT_WRITEBACK_INV_D, HIT_INVALIDATE_I);
- return;
+ goto ops_done;
}
/* flush D-cache */
cache_loop(start_addr, start_addr + size, dlsize, HIT_WRITEBACK_INV_D);
+ /* flush L2 cache */
+ cache_loop(start_addr, start_addr + size, slsize, HIT_WRITEBACK_INV_SD);
+
/* flush I-cache */
cache_loop(start_addr, start_addr + size, ilsize, HIT_INVALIDATE_I);
+
+ops_done:
+ /* ensure cache ops complete before any further memory accesses */
+ sync();
+
+ /* ensure the pipeline doesn't contain now-invalid instructions */
+ instruction_hazard_barrier();
}
-void flush_dcache_range(ulong start_addr, ulong stop)
+void __weak flush_dcache_range(ulong start_addr, ulong stop)
{
unsigned long lsize = dcache_line_size();
+ unsigned long slsize = scache_line_size();
/* aend will be miscalculated when size is zero, so we return here */
if (start_addr == stop)
return;
cache_loop(start_addr, stop, lsize, HIT_WRITEBACK_INV_D);
+
+ /* flush L2 cache */
+ cache_loop(start_addr, stop, slsize, HIT_WRITEBACK_INV_SD);
+
+ /* ensure cache ops complete before any further memory accesses */
+ sync();
}
void invalidate_dcache_range(ulong start_addr, ulong stop)
{
unsigned long lsize = dcache_line_size();
+ unsigned long slsize = scache_line_size();
/* aend will be miscalculated when size is zero, so we return here */
if (start_addr == stop)
return;
+ /* invalidate L2 cache */
+ cache_loop(start_addr, stop, slsize, HIT_INVALIDATE_SD);
+
cache_loop(start_addr, stop, lsize, HIT_INVALIDATE_D);
+
+ /* ensure cache ops complete before any further memory accesses */
+ sync();
+}
+
+int dcache_status(void)
+{
+ unsigned int cca = read_c0_config() & CONF_CM_CMASK;
+ return cca != CONF_CM_UNCACHED;
+}
+
+void dcache_enable(void)
+{
+ puts("Not supported!\n");
+}
+
+void dcache_disable(void)
+{
+ /* change CCA to uncached */
+ change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
+
+ /* ensure the pipeline doesn't contain now-invalid instructions */
+ instruction_hazard_barrier();
}
projects / oweals / u-boot.git / blobdiff