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Diffstat (limited to 'arch/blackfin/mm/isram-driver.c')
-rw-r--r--arch/blackfin/mm/isram-driver.c95
1 files changed, 52 insertions, 43 deletions
diff --git a/arch/blackfin/mm/isram-driver.c b/arch/blackfin/mm/isram-driver.c
index 9213e2357888..7e2e674ed444 100644
--- a/arch/blackfin/mm/isram-driver.c
+++ b/arch/blackfin/mm/isram-driver.c
@@ -11,6 +11,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
+#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/sched.h>
@@ -42,13 +43,12 @@ static DEFINE_SPINLOCK(dtest_lock);
/* Takes a void pointer */
#define IADDR2DTEST(x) \
({ unsigned long __addr = (unsigned long)(x); \
- (__addr & 0x47F8) | /* address bits 14 & 10:3 */ \
- (__addr & 0x8000) << 23 | /* Bank A/B */ \
- (__addr & 0x0800) << 15 | /* address bit 11 */ \
- (__addr & 0x3000) << 4 | /* address bits 13:12 */ \
- (__addr & 0x8000) << 8 | /* address bit 15 */ \
- (0x1000000) | /* instruction access = 1 */ \
- (0x4); /* data array = 1 */ \
+ ((__addr & (1 << 11)) << (26 - 11)) | /* addr bit 11 (Way0/Way1) */ \
+ (1 << 24) | /* instruction access = 1 */ \
+ ((__addr & (1 << 15)) << (23 - 15)) | /* addr bit 15 (Data Bank) */ \
+ ((__addr & (3 << 12)) << (16 - 12)) | /* addr bits 13:12 (Subbank) */ \
+ (__addr & 0x47F8) | /* addr bits 14 & 10:3 */ \
+ (1 << 2); /* data array = 1 */ \
})
/* Takes a pointer, and returns the offset (in bits) which things should be shifted */
@@ -195,7 +195,7 @@ EXPORT_SYMBOL(isram_memcpy);
#ifdef CONFIG_BFIN_ISRAM_SELF_TEST
-#define TEST_LEN 0x100
+static int test_len = 0x20000;
static __init void hex_dump(unsigned char *buf, int len)
{
@@ -211,15 +211,15 @@ static __init int isram_read_test(char *sdram, void *l1inst)
pr_info("INFO: running isram_read tests\n");
/* setup some different data to play with */
- for (i = 0; i < TEST_LEN; ++i)
- sdram[i] = i;
- dma_memcpy(l1inst, sdram, TEST_LEN);
+ for (i = 0; i < test_len; ++i)
+ sdram[i] = i % 255;
+ dma_memcpy(l1inst, sdram, test_len);
/* make sure we can read the L1 inst */
- for (i = 0; i < TEST_LEN; i += sizeof(uint64_t)) {
+ for (i = 0; i < test_len; i += sizeof(uint64_t)) {
data1 = isram_read(l1inst + i);
memcpy(&data2, sdram + i, sizeof(data2));
- if (memcmp(&data1, &data2, sizeof(uint64_t))) {
+ if (data1 != data2) {
pr_err("FAIL: isram_read(%p) returned %#llx but wanted %#llx\n",
l1inst + i, data1, data2);
++ret;
@@ -237,25 +237,25 @@ static __init int isram_write_test(char *sdram, void *l1inst)
pr_info("INFO: running isram_write tests\n");
/* setup some different data to play with */
- memset(sdram, 0, TEST_LEN * 2);
- dma_memcpy(l1inst, sdram, TEST_LEN);
- for (i = 0; i < TEST_LEN; ++i)
- sdram[i] = i;
+ memset(sdram, 0, test_len * 2);
+ dma_memcpy(l1inst, sdram, test_len);
+ for (i = 0; i < test_len; ++i)
+ sdram[i] = i % 255;
/* make sure we can write the L1 inst */
- for (i = 0; i < TEST_LEN; i += sizeof(uint64_t)) {
+ for (i = 0; i < test_len; i += sizeof(uint64_t)) {
memcpy(&data1, sdram + i, sizeof(data1));
isram_write(l1inst + i, data1);
data2 = isram_read(l1inst + i);
- if (memcmp(&data1, &data2, sizeof(uint64_t))) {
+ if (data1 != data2) {
pr_err("FAIL: isram_write(%p, %#llx) != %#llx\n",
l1inst + i, data1, data2);
++ret;
}
}
- dma_memcpy(sdram + TEST_LEN, l1inst, TEST_LEN);
- if (memcmp(sdram, sdram + TEST_LEN, TEST_LEN)) {
+ dma_memcpy(sdram + test_len, l1inst, test_len);
+ if (memcmp(sdram, sdram + test_len, test_len)) {
pr_err("FAIL: isram_write() did not work properly\n");
++ret;
}
@@ -267,12 +267,12 @@ static __init int
_isram_memcpy_test(char pattern, void *sdram, void *l1inst, const char *smemcpy,
void *(*fmemcpy)(void *, const void *, size_t))
{
- memset(sdram, pattern, TEST_LEN);
- fmemcpy(l1inst, sdram, TEST_LEN);
- fmemcpy(sdram + TEST_LEN, l1inst, TEST_LEN);
- if (memcmp(sdram, sdram + TEST_LEN, TEST_LEN)) {
+ memset(sdram, pattern, test_len);
+ fmemcpy(l1inst, sdram, test_len);
+ fmemcpy(sdram + test_len, l1inst, test_len);
+ if (memcmp(sdram, sdram + test_len, test_len)) {
pr_err("FAIL: %s(%p <=> %p, %#x) failed (data is %#x)\n",
- smemcpy, l1inst, sdram, TEST_LEN, pattern);
+ smemcpy, l1inst, sdram, test_len, pattern);
return 1;
}
return 0;
@@ -291,12 +291,13 @@ static __init int isram_memcpy_test(char *sdram, void *l1inst)
/* check read of small, unaligned, and hardware 64bit limits */
pr_info("INFO: running isram_memcpy (read) tests\n");
- for (i = 0; i < TEST_LEN; ++i)
- sdram[i] = i;
- dma_memcpy(l1inst, sdram, TEST_LEN);
+ /* setup some different data to play with */
+ for (i = 0; i < test_len; ++i)
+ sdram[i] = i % 255;
+ dma_memcpy(l1inst, sdram, test_len);
thisret = 0;
- for (i = 0; i < TEST_LEN - 32; ++i) {
+ for (i = 0; i < test_len - 32; ++i) {
unsigned char cmp[32];
for (j = 1; j <= 32; ++j) {
memset(cmp, 0, sizeof(cmp));
@@ -309,7 +310,7 @@ static __init int isram_memcpy_test(char *sdram, void *l1inst)
pr_cont("\n");
if (++thisret > 20) {
pr_err("FAIL: skipping remaining series\n");
- i = TEST_LEN;
+ i = test_len;
break;
}
}
@@ -320,11 +321,11 @@ static __init int isram_memcpy_test(char *sdram, void *l1inst)
/* check write of small, unaligned, and hardware 64bit limits */
pr_info("INFO: running isram_memcpy (write) tests\n");
- memset(sdram + TEST_LEN, 0, TEST_LEN);
- dma_memcpy(l1inst, sdram + TEST_LEN, TEST_LEN);
+ memset(sdram + test_len, 0, test_len);
+ dma_memcpy(l1inst, sdram + test_len, test_len);
thisret = 0;
- for (i = 0; i < TEST_LEN - 32; ++i) {
+ for (i = 0; i < test_len - 32; ++i) {
unsigned char cmp[32];
for (j = 1; j <= 32; ++j) {
isram_memcpy(l1inst + i, sdram + i, j);
@@ -337,7 +338,7 @@ static __init int isram_memcpy_test(char *sdram, void *l1inst)
pr_cont("\n");
if (++thisret > 20) {
pr_err("FAIL: skipping remaining series\n");
- i = TEST_LEN;
+ i = test_len;
break;
}
}
@@ -354,22 +355,30 @@ static __init int isram_test_init(void)
char *sdram;
void *l1inst;
- sdram = kmalloc(TEST_LEN * 2, GFP_KERNEL);
- if (!sdram) {
- pr_warning("SKIP: could not allocate sdram\n");
- return 0;
+ /* Try to test as much of L1SRAM as possible */
+ while (test_len) {
+ test_len >>= 1;
+ l1inst = l1_inst_sram_alloc(test_len);
+ if (l1inst)
+ break;
}
-
- l1inst = l1_inst_sram_alloc(TEST_LEN);
if (!l1inst) {
- kfree(sdram);
pr_warning("SKIP: could not allocate L1 inst\n");
return 0;
}
+ pr_info("INFO: testing %#x bytes (%p - %p)\n",
+ test_len, l1inst, l1inst + test_len);
+
+ sdram = kmalloc(test_len * 2, GFP_KERNEL);
+ if (!sdram) {
+ sram_free(l1inst);
+ pr_warning("SKIP: could not allocate sdram\n");
+ return 0;
+ }
/* sanity check initial L1 inst state */
ret = 1;
- pr_info("INFO: running initial dma_memcpy checks\n");
+ pr_info("INFO: running initial dma_memcpy checks %p\n", sdram);
if (_isram_memcpy_test(0xa, sdram, l1inst, dma_memcpy))
goto abort;
if (_isram_memcpy_test(0x5, sdram, l1inst, dma_memcpy))
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