software/bios/sdram: select the type of data we want to generate for memtest with...

diff --git a/software/bios/sdram.c b/software/bios/sdram.c
index d374e9d37d0edbf29732f6177fc49a9ae7b4cfa4..f3dca3e450b2652f1b41c921df40b68c027458f8 100644 (file)
--- a/software/bios/sdram.c
+++ b/software/bios/sdram.c
@@ -423,15 +423,24 @@ int sdrlevel(void)
 #endif /* CSR_DDRPHY_BASE */
 
 #define TEST_SIZE (2*1024*1024)
+#define TEST_RANDOM_DATA 1
 
 #define ONEZERO 0xAAAAAAAA
 #define ZEROONE 0x55555555
 
+unsigned int seed_to_data(unsigned int seed, int random)
+{
+       if (random)
+               return 1664525*seed + 1013904223;
+       else
+               return seed + 1;
+}
+
 int memtest_silent(void)
 {
        volatile unsigned int *array = (unsigned int *)MAIN_RAM_BASE;
        int i;
-       unsigned int prv;
+       unsigned int seed;
        unsigned int error_cnt;
 
        /* test data bus */
@@ -453,18 +462,18 @@ int memtest_silent(void)
                        error_cnt++;
        }
 
-       /* test random data */
-       prv = 0;
+       /* test counter or random data */
+       seed = 0;
        for(i=0;i<TEST_SIZE/4;i++) {
-               prv = 1664525*prv + 1013904223;
-               array[i] = prv;
+               seed = seed_to_data(seed, TEST_RANDOM_DATA);
+               array[i] = seed;
        }
 
-       prv = 0;
+       seed = 0;
        error_cnt = 0;
        for(i=0;i<TEST_SIZE/4;i++) {
-               prv = 1664525*prv + 1013904223;
-               if(array[i] != prv)
+               seed = seed_to_data(seed, TEST_RANDOM_DATA);
+               if(array[i] != seed)
                        error_cnt++;
        }
        return error_cnt;

diff --git a/software/bios/sdram.h b/software/bios/sdram.h
index c5d0984ff7a11b76903070da7f0636c74844d954..af20e31f92ac16fa5d9f554a9a579c4a9fb5496c 100644 (file)
--- a/software/bios/sdram.h
+++ b/software/bios/sdram.h
@@ -17,6 +17,7 @@ void sdrwloff(void);
 int sdrlevel(void);
 #endif
 
+unsigned int seed_to_data(unsigned int seed, int random);
 int memtest_silent(void);
 int memtest(void);
 int sdrinit(void);