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/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef CPU_AMD_MTRR_H
#define CPU_AMD_MTRR_H
#define MTRR_IORR0_BASE 0xC0010016
#define MTRR_IORR0_MASK 0xC0010017
#define MTRR_IORR1_BASE 0xC0010018
#define MTRR_IORR1_MASK 0xC0010019
#define MTRR_READ_MEM (1 << 4)
#define MTRR_WRITE_MEM (1 << 3)
#define SYSCFG_MSR 0xC0010010
#define SYSCFG_MSR_SMEE (1 << 23)
#define SYSCFG_MSR_TOM2WB (1 << 22)
#define SYSCFG_MSR_TOM2En (1 << 21)
#define SYSCFG_MSR_MtrrVarDramEn (1 << 20)
#define SYSCFG_MSR_MtrrFixDramModEn (1 << 19)
#define SYSCFG_MSR_MtrrFixDramEn (1 << 18)
#define SYSCFG_MSR_UcLockEn (1 << 17)
#define SYSCFG_MSR_ChxToDirtyDis (1 << 16)
#define SYSCFG_MSR_ClVicBlkEn (1 << 11)
#define SYSCFG_MSR_SetDirtyEnO (1 << 10)
#define SYSCFG_MSR_SetDirtyEnS (1 << 9)
#define SYSCFG_MSR_SetDirtyEnE (1 << 8)
#define SYSCFG_MSR_SysVicLimitMask ((1 << 8) - (1 << 5))
#define SYSCFG_MSR_SysAckLimitMask ((1 << 5) - (1 << 0))
#define IORRBase_MSR(reg) (0xC0010016 + 2 * (reg))
#define IORRMask_MSR(reg) (0xC0010016 + 2 * (reg) + 1)
#define TOP_MEM_MSR 0xC001001A
#define TOP_MEM2_MSR 0xC001001D
#if !defined(__ASSEMBLER__)
#include <cpu/x86/msr.h>
#include <stdint.h>
struct device;
void add_uma_resource_below_tolm(struct device *nb, int idx);
static __always_inline msr_t rdmsr_amd(unsigned int index)
{
msr_t result;
__asm__ __volatile__ (
"rdmsr"
: "=a" (result.lo), "=d" (result.hi)
: "c"(index), "D"(0x9c5a203a)
);
return result;
}
static __always_inline void wrmsr_amd(unsigned int index, msr_t msr)
{
__asm__ __volatile__ (
"wrmsr"
: /* No outputs */
: "c" (index), "a" (msr.lo), "d" (msr.hi), "D" (0x9c5a203a)
);
}
static inline uint32_t get_top_of_mem_below_4gb(void)
{
return rdmsr(TOP_MEM_MSR).lo;
}
static inline uint64_t get_top_of_mem_above_4gb(void)
{
msr_t msr = rdmsr(TOP_MEM2_MSR);
return (uint64_t)msr.hi << 32 | msr.lo;
}
#endif
#endif /* CPU_AMD_MTRR_H */
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