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093af8d7f0
when MTRRs are not covering the whole e820 table, we need to trim the RAM and need to update e820. reuse some code on 64-bit as well. here need to add early_get_cap and use it in early_cpu_detect, and move mtrr_bp_init early. The code successfully trimmed the memory map on Justin's system: from: [ 0.000000] BIOS-e820: 0000000100000000 - 000000022c000000 (usable) to: [ 0.000000] modified: 0000000100000000 - 0000000228000000 (usable) [ 0.000000] modified: 0000000228000000 - 000000022c000000 (reserved) According to Justin it makes quite a difference: | When I boot the box without any trimming it acts like a 286 or 386, | takes about 10 minutes to boot (using raptor disks). Signed-off-by: Yinghai Lu <yinghai.lu@sun.com> Tested-by: Justin Piszcz <jpiszcz@lucidpixels.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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| .. | ||
| cpufreq | ||
| mcheck | ||
| mtrr | ||
| addon_cpuid_features.c | ||
| amd.c | ||
| bugs.c | ||
| centaur.c | ||
| common.c | ||
| cpu.h | ||
| cyrix.c | ||
| intel_cacheinfo.c | ||
| intel.c | ||
| Makefile | ||
| nexgen.c | ||
| perfctr-watchdog.c | ||
| proc.c | ||
| transmeta.c | ||
| umc.c | ||