From 6d74171bf7315257d276aa35400c5a8d6a993f19 Mon Sep 17 00:00:00 2001 From: Andreas Herrmann Date: Wed, 25 Feb 2009 11:27:27 +0100 Subject: [PATCH] x86: memtest: introduce array to select memtest patterns Impact: code cleanup Signed-off-by: Andreas Herrmann Signed-off-by: Ingo Molnar --- arch/x86/mm/memtest.c | 65 +++++++++++++++---------------------------- 1 file changed, 23 insertions(+), 42 deletions(-) diff --git a/arch/x86/mm/memtest.c b/arch/x86/mm/memtest.c index 00b8bdc64c3e..827f94044cfc 100644 --- a/arch/x86/mm/memtest.c +++ b/arch/x86/mm/memtest.c @@ -9,48 +9,25 @@ #include -#define _MAX_MEM_PATTERNS 4 +static u64 patterns[] __initdata = { + 0, + 0xffffffffffffffffULL, + 0x5555555555555555ULL, + 0xaaaaaaaaaaaaaaaaULL, +}; static void __init memtest(unsigned long start_phys, unsigned long size, - unsigned pattern) + u64 pattern) { unsigned long i; - unsigned long *start; + u64 *start; unsigned long start_bad; unsigned long last_bad; - unsigned long val; unsigned long start_phys_aligned; unsigned long count; unsigned long incr; - pattern = pattern % _MAX_MEM_PATTERNS; - - switch (pattern) { - case 0: - val = 0UL; - break; - case 1: - val = -1UL; - break; - case 2: -#ifdef CONFIG_X86_64 - val = 0x5555555555555555UL; -#else - val = 0x55555555UL; -#endif - break; - case 3: -#ifdef CONFIG_X86_64 - val = 0xaaaaaaaaaaaaaaaaUL; -#else - val = 0xaaaaaaaaUL; -#endif - break; - default: - return; - } - - incr = sizeof(unsigned long); + incr = sizeof(pattern); start_phys_aligned = ALIGN(start_phys, incr); count = (size - (start_phys_aligned - start_phys))/incr; start = __va(start_phys_aligned); @@ -58,15 +35,16 @@ static void __init memtest(unsigned long start_phys, unsigned long size, last_bad = 0; for (i = 0; i < count; i++) - start[i] = val; + start[i] = pattern; for (i = 0; i < count; i++, start++, start_phys_aligned += incr) { - if (*start != val) { + if (*start != pattern) { if (start_phys_aligned == last_bad + incr) { last_bad += incr; } else { if (start_bad) { - printk(KERN_CONT "\n %016lx bad mem addr %010lx - %010lx reserved", - val, start_bad, last_bad + incr); + printk(KERN_CONT "\n %016llx bad mem addr %010lx - %010lx reserved", + (unsigned long long) pattern, + start_bad, last_bad + incr); reserve_early(start_bad, last_bad + incr, "BAD RAM"); } start_bad = last_bad = start_phys_aligned; @@ -74,8 +52,9 @@ static void __init memtest(unsigned long start_phys, unsigned long size, } } if (start_bad) { - printk(KERN_CONT "\n %016lx bad mem addr %010lx - %010lx reserved", - val, start_bad, last_bad + incr); + printk(KERN_CONT "\n %016llx bad mem addr %010lx - %010lx reserved", + (unsigned long long) pattern, start_bad, + last_bad + incr); reserve_early(start_bad, last_bad + incr, "BAD RAM"); } } @@ -95,13 +74,16 @@ early_param("memtest", parse_memtest); void __init early_memtest(unsigned long start, unsigned long end) { u64 t_start, t_size; - unsigned pattern; + unsigned int i; + u64 pattern; if (!memtest_pattern) return; printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern); - for (pattern = 0; pattern < memtest_pattern; pattern++) { + for (i = 0; i < memtest_pattern; i++) { + unsigned int idx = i % ARRAY_SIZE(patterns); + pattern = patterns[idx]; t_start = start; t_size = 0; while (t_start < end) { @@ -115,8 +97,7 @@ void __init early_memtest(unsigned long start, unsigned long end) printk(KERN_CONT "\n %010llx - %010llx pattern %d", (unsigned long long)t_start, - (unsigned long long)t_start + t_size, - pattern % _MAX_MEM_PATTERNS); + (unsigned long long)t_start + t_size, idx); memtest(t_start, t_size, pattern); -- 2.20.1