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发表于 2008-7-15 16:47:40
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可以把software smi value写入一个特定SMI TRAP IO端口来产生SW SMI。对于intel chipset来说,这个端口一般是0B2h。
0 _) k. x, u, Qich7 spec里摘出的:
0 r: r6 i; C/ d0 v( J& F----------------------------------------
8 v/ P- L& Q9 O2 VAPM_CNT—Advanced Power Management Control Port Register; e/ I2 o6 N4 ]$ s$ y0 r- j6 j
I/O Address: B2h Attribute: R/W
1 r/ M }' U# z) D' NDefault Value: 00h Size: 8-bit* p" q* B0 ?; Y2 r
Lockable: No Usage: Legacy Only' J. b5 k2 f- B1 B
Power Well: Core. M n7 b b* n4 ~7 R, E" F# X
Bit Description
: a4 ?5 n6 c; q) a8 u$ C7:0. ~# I$ l- e) e: a
Used to pass an APM command between the OS and the SMI handler. Writes to this5 ^7 b4 u" ~. h9 l, x8 ^. r7 J( f1 w
port not only store data in the APMC register, but also generates an SMI# when the! D1 p: E) N z6 ?
APMC_EN bit is set.
5 c/ @2 M$ _' U---------------------------------------3 H7 \; L* n5 t. j7 j* ?
4 d" F, _5 `' w+ J+ L* u
[ 本帖最后由 alanzhu 于 2008-7-15 16:57 编辑 ] |
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