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boot/bios_ia32: basic support la57 aka 5-level paging for x86_64 kernels

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la57 kernel support is required. we simply add a 5th level and enable the cr4
feature. the safemode option "256tb_memory_limit" is named after the 4gb one,
but the current support is limited to 512GB as before (this can be later extended).

Change-Id: I922774473c4a6112a0e4ff74162285ad58aa53af
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3552
Reviewed-by: Adrien Destugues <[email protected]>
Reviewed-by: Axel Dörfler <[email protected]>
This commit is contained in:
Jérôme Duval
2020-12-28 18:21:11 +00:00
parent 58353b3809
commit 1f8a8d2b48
4 changed files with 69 additions and 26 deletions
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headers/private/system/safemode_defs.h
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@@ -18,6 +18,7 @@
#define B_SAFEMODE_DISABLE_HYPER_THREADING "disable_hyperthreading"
#define B_SAFEMODE_FAIL_SAFE_VIDEO_MODE "fail_safe_video_mode"
#define B_SAFEMODE_4_GB_MEMORY_LIMIT "4gb_memory_limit"
#define B_SAFEMODE_256_TB_MEMORY_LIMIT "256tb_memory_limit"
#if DEBUG_SPINLOCK_LATENCIES
# define B_SAFEMODE_DISABLE_LATENCY_CHECK "disable_latency_check"