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#ifndef CPU_X86_MTRR_H
#define CPU_X86_MTRR_H
/* These are the region types */
#define MTRR_TYPE_UNCACHEABLE 0
#define MTRR_TYPE_WRCOMB 1
#define MTRR_TYPE_WRTHROUGH 4
#define MTRR_TYPE_WRPROT 5
#define MTRR_TYPE_WRBACK 6
#define MTRR_NUM_TYPES 7
#define MTRR_CAP_MSR 0x0fe
#define MTRR_CAP_SMRR (1 << 11)
#define MTRR_CAP_WC (1 << 10)
#define MTRR_CAP_FIX (1 << 8)
#define MTRR_CAP_VCNT 0xff
#define MTRR_DEF_TYPE_MSR 0x2ff
#define MTRR_DEF_TYPE_MASK 0xff
#define MTRR_DEF_TYPE_EN (1 << 11)
#define MTRR_DEF_TYPE_FIX_EN (1 << 10)
#define SMRR_PHYS_BASE 0x1f2
#define SMRR_PHYS_MASK 0x1f3
#define MTRR_PHYS_BASE(reg) (0x200 + 2 * (reg))
#define MTRR_PHYS_MASK(reg) (MTRR_PHYS_BASE(reg) + 1)
#define MTRR_PHYS_MASK_VALID (1 << 11)
#define NUM_FIXED_RANGES 88
#define RANGES_PER_FIXED_MTRR 8
#define MTRR_FIX_64K_00000 0x250
#define MTRR_FIX_16K_80000 0x258
#define MTRR_FIX_16K_A0000 0x259
#define MTRR_FIX_4K_C0000 0x268
#define MTRR_FIX_4K_C8000 0x269
#define MTRR_FIX_4K_D0000 0x26a
#define MTRR_FIX_4K_D8000 0x26b
#define MTRR_FIX_4K_E0000 0x26c
#define MTRR_FIX_4K_E8000 0x26d
#define MTRR_FIX_4K_F0000 0x26e
#define MTRR_FIX_4K_F8000 0x26f
#if !defined(__ASSEMBLER__) && !defined(__ROMCC__)
#include <stdint.h>
#include <stddef.h>
/*
* The MTRR code has some side effects that the callers should be aware for.
* 1. The call sequence matters. x86_setup_mtrrs() calls
* x86_setup_fixed_mtrrs_no_enable() then enable_fixed_mtrrs() (equivalent
* of x86_setup_fixed_mtrrs()) then x86_setup_var_mtrrs(). If the callers
* want to call the components of x86_setup_mtrrs() because of other
* requirements the ordering should still preserved.
* 2. enable_fixed_mtrr() will enable both variable and fixed MTRRs because
* of the nature of the global MTRR enable flag. Therefore, all direct
* or indirect callers of enable_fixed_mtrr() should ensure that the
* variable MTRR MSRs do not contain bad ranges.
*
* Note that this function sets up MTRRs for addresses above 4GiB.
*/
void x86_setup_mtrrs(void);
/*
* x86_setup_mtrrs_with_detect() does the same thing as x86_setup_mtrrs(), but
* it always dynamically detects the number of variable MTRRs available.
*/
void x86_setup_mtrrs_with_detect(void);
/*
* x86_setup_var_mtrrs() parameters:
* address_bits - number of physical address bits supported by cpu
* above4gb - if set setup MTRRs for addresses above 4GiB else ignore
* memory ranges above 4GiB
*/
void x86_setup_var_mtrrs(unsigned int address_bits, unsigned int above4gb);
void enable_fixed_mtrr(void);
void x86_setup_fixed_mtrrs(void);
/* Set up fixed MTRRs but do not enable them. */
void x86_setup_fixed_mtrrs_no_enable(void);
void x86_mtrr_check(void);
/* Insert a temporary MTRR range for the duration of coreboot's runtime.
* This function needs to be called after the first MTRR solution is derived. */
void mtrr_use_temp_range(uintptr_t begin, size_t size, int type);
void set_var_mtrr(unsigned int reg, unsigned int base, unsigned int size,
unsigned int type);
int get_free_var_mtrr(void);
/* fms: find most significant bit set, stolen from Linux Kernel Source. */
static inline unsigned int fms(unsigned int x)
{
int r;
__asm__("bsrl %1,%0\n\t"
"jnz 1f\n\t"
"movl $0,%0\n"
"1:" : "=r" (r) : "mr" (x));
return r;
}
/* fls: find least significant bit set */
static inline unsigned int fls(unsigned int x)
{
int r;
__asm__("bsfl %1,%0\n\t"
"jnz 1f\n\t"
"movl $32,%0\n"
"1:" : "=r" (r) : "mr" (x));
return r;
}
#endif /* !defined(__ASSEMBLER__) && !defined(__ROMCC__) */
/* Align up to next power of 2, suitable for ROMCC and assembler too.
* Range of result 256kB to 128MB is good enough here.
*/
#define _POW2_MASK(x) ((x>>1)|(x>>2)|(x>>3)|(x>>4)|(x>>5)| \
(x>>6)|(x>>7)|(x>>8)|((1<<18)-1))
#define _ALIGN_UP_POW2(x) ((x + _POW2_MASK(x)) & ~_POW2_MASK(x))
/* At the end of romstage, low RAM 0..CACHE_TM_RAMTOP may be set
* as write-back cacheable to speed up ramstage decompression.
* Note MTRR boundaries, must be power of two.
*/
#define CACHE_TMP_RAMTOP (16<<20)
#if ((CONFIG_XIP_ROM_SIZE & (CONFIG_XIP_ROM_SIZE - 1)) != 0)
# error "CONFIG_XIP_ROM_SIZE is not a power of 2"
#endif
/* Select CACHE_ROM_SIZE to use with MTRR setup. For most cases this
* resolves to a suitable CONFIG_ROM_SIZE but some odd cases need to
* use CONFIG_CACHE_ROM_SIZE_OVERRIDE in the mainboard Kconfig.
*/
#if (CONFIG_CACHE_ROM_SIZE_OVERRIDE != 0)
# define CACHE_ROM_SIZE CONFIG_CACHE_ROM_SIZE_OVERRIDE
#else
# if ((CONFIG_ROM_SIZE & (CONFIG_ROM_SIZE-1)) == 0)
# define CACHE_ROM_SIZE CONFIG_ROM_SIZE
# else
# define CACHE_ROM_SIZE _ALIGN_UP_POW2(CONFIG_ROM_SIZE)
# if (CACHE_ROM_SIZE < CONFIG_ROM_SIZE) || (CACHE_ROM_SIZE >= \
(2 * CONFIG_ROM_SIZE))
# error "CACHE_ROM_SIZE is not optimal."
# endif
# endif
#endif
#if ((CACHE_ROM_SIZE & (CACHE_ROM_SIZE-1)) != 0)
# error "CACHE_ROM_SIZE is not a power of 2."
#endif
#define CACHE_ROM_BASE (((1<<20) - (CACHE_ROM_SIZE>>12))<<12)
#if (IS_ENABLED(CONFIG_SOC_SETS_MSRS) && !defined(__ASSEMBLER__) \
&& !defined(__ROMCC__))
#include <cpu/x86/msr.h>
#include <arch/cpu.h>
/*
* Set the MTRRs using the data on the stack from setup_stack_and_mtrrs.
* Return a new top_of_stack value which removes the setup_stack_and_mtrrs data.
*/
asmlinkage void *soc_set_mtrrs(void *top_of_stack);
asmlinkage void soc_enable_mtrrs(void);
#endif /* CONFIG_SOC_SETS_MSRS ... */
#endif /* CPU_X86_MTRR_H */
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