cpu/x86/smm: use macros for CR0 flags
Use the existing macros for CR0 to set the flags in the SMM stub. Change-Id: I0f02fd6b0c14cee35ec33be2cac51057d18b82c0 Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: https://review.coreboot.org/20242 Reviewed-by: Furquan Shaikh <furquan@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
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@ -23,6 +23,8 @@
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* found in smm.h.
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*/
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#include <cpu/x86/cr.h>
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.code32
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.section ".module_parameters", "aw", @progbits
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stub_entry_params:
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@ -53,6 +55,10 @@ fallback_stack_bottom:
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.skip 128
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fallback_stack_top:
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#define CR0_CLEAR_FLAGS \
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(CR0_CD | CR0_NW | CR0_PG | CR0_AM | CR0_WP | \
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CR0_NE | CR0_TS | CR0_EM | CR0_MP)
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.text
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.code16
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.global _start
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@ -61,8 +67,8 @@ _start:
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data32 lgdt (%ebx)
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movl %cr0, %eax
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andl $0x1FFAFFD1, %eax /* CD,NW,PG,AM,WP,NE,TS,EM,MP = 0 */
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orl $0x1, %eax /* PE = 1 */
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andl $~CR0_CLEAR_FLAGS, %eax
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orl $CR0_PE, %eax
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movl %eax, %cr0
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/* Enable protected mode */
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