coreboot
coreboot is an Open Source project aimed at replacing the proprietary BIOS found in most computers.
cpu.h
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1 /* SPDX-License-Identifier: GPL-2.0-only */
2 
3 #ifndef AMD_STONEYRIDGE_CPU_H
4 #define AMD_STONEYRIDGE_CPU_H
5 
6 /*
7  * Set a variable MTRR in bootblock and/or romstage. AGESA will use the lowest
8  * numbered registers. Any values defined below are subtracted from the
9  * highest numbered registers.
10  *
11  * todo: Revisit this once AGESA no longer programs MTRRs.
12  */
13 #define SOC_EARLY_VMTRR_FLASH 1
14 #define SOC_EARLY_VMTRR_CAR_HEAP 2
15 #define SOC_EARLY_VMTRR_TEMPRAM 3
16 
17 #endif /* AMD_STONEYRIDGE_CPU_H */