/*
- * Generic MTRR (Memory Type Range Register) ioctls.
- * Taken from the Linux kernel
+ * Copyright (c) 2014 Google, Inc
*
- * (C) Copyright 2012
- * Graeme Russ, <graeme.russ@gmail.com>
- *
- * Copyright (C) 1997-1999 Richard Gooch <rgooch@atnf.csiro.au>
+ * From Coreboot file of the same name
*
* SPDX-License-Identifier: GPL-2.0+
*/
-#ifndef _ASM_X86_MTRR_H
-#define _ASM_X86_MTRR_H
+#ifndef _ASM_MTRR_H
+#define _ASM_MTRR_H
+
+/* These are the region types */
+#define MTRR_TYPE_UNCACHEABLE 0
+#define MTRR_TYPE_WRCOMB 1
+/*#define MTRR_TYPE_ 2*/
+/*#define MTRR_TYPE_ 3*/
+#define MTRR_TYPE_WRTHROUGH 4
+#define MTRR_TYPE_WRPROT 5
+#define MTRR_TYPE_WRBACK 6
+#define MTRR_NUM_TYPES 7
+
+#define MTRRcap_MSR 0x0fe
+#define MTRRdefType_MSR 0x2ff
+
+#define MTRRdefTypeEn (1 << 11)
+#define MTRRdefTypeFixEn (1 << 10)
+
+#define SMRRphysBase_MSR 0x1f2
+#define SMRRphysMask_MSR 0x1f3
#define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
#define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
-#ifndef __ASSEMBLY__
+#define MTRRphysMaskValid (1 << 11)
-#include <linux/types.h>
-#include <linux/ioctl.h>
-#include <errno.h>
+#define NUM_FIXED_RANGES 88
+#define RANGES_PER_FIXED_MTRR 8
+#define MTRRfix64K_00000_MSR 0x250
+#define MTRRfix16K_80000_MSR 0x258
+#define MTRRfix16K_A0000_MSR 0x259
+#define MTRRfix4K_C0000_MSR 0x268
+#define MTRRfix4K_C8000_MSR 0x269
+#define MTRRfix4K_D0000_MSR 0x26a
+#define MTRRfix4K_D8000_MSR 0x26b
+#define MTRRfix4K_E0000_MSR 0x26c
+#define MTRRfix4K_E8000_MSR 0x26d
+#define MTRRfix4K_F0000_MSR 0x26e
+#define MTRRfix4K_F8000_MSR 0x26f
-#define MTRR_IOCTL_BASE 'M'
-
-struct mtrr_sentry {
- unsigned long base; /* Base address */
- unsigned int size; /* Size of region */
- unsigned int type; /* Type of region */
-};
+#if !defined(__ASSEMBLER__)
/*
- * Warning: this structure has a different order from i386
- * on x86-64. The 32bit emulation code takes care of that.
- * But you need to use this for 64bit, otherwise your X server
- * will break.
+ * 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
+ * rquirements 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.
+ * 3. If CONFIG_CACHE_ROM is selected an MTRR is allocated for enabling
+ * the caching of the ROM. However, it is set to uncacheable (UC). It
+ * is the responsiblity of the caller to enable it by calling
+ * x86_mtrr_enable_rom_caching().
*/
-
-#ifdef __i386__
-struct mtrr_gentry {
- unsigned int regnum; /* Register number */
- unsigned long base; /* Base address */
- unsigned int size; /* Size of region */
- unsigned int type; /* Type of region */
-};
-
-#else /* __i386__ */
-
-struct mtrr_gentry {
- unsigned long base; /* Base address */
- unsigned int size; /* Size of region */
- unsigned int regnum; /* Register number */
- unsigned int type; /* Type of region */
-};
-#endif /* !__i386__ */
-
-struct mtrr_var_range {
- __u32 base_lo;
- __u32 base_hi;
- __u32 mask_lo;
- __u32 mask_hi;
-};
-
+void x86_setup_mtrrs(void);
/*
- * In the Intel processor's MTRR interface, the MTRR type is always held in
- * an 8 bit field:
+ * x86_setup_var_mtrrs() parameters:
+ * address_bits - number of physical address bits supported by cpu
+ * above4gb - 2 means dynamically detect number of variable MTRRs available.
+ * non-zero means handle memory ranges above 4GiB.
+ * 0 means ignore memory ranges above 4GiB
*/
-typedef __u8 mtrr_type;
-
-#define MTRR_NUM_FIXED_RANGES 88
-#define MTRR_MAX_VAR_RANGES 256
-
-struct mtrr_state_type {
- struct mtrr_var_range var_ranges[MTRR_MAX_VAR_RANGES];
- mtrr_type fixed_ranges[MTRR_NUM_FIXED_RANGES];
- unsigned char enabled;
- unsigned char have_fixed;
- mtrr_type def_type;
-};
-
-/* These are the various ioctls */
-#define MTRRIOC_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry)
-#define MTRRIOC_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry)
-#define MTRRIOC_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry)
-#define MTRRIOC_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry)
-#define MTRRIOC_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry)
-#define MTRRIOC_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry)
-#define MTRRIOC_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry)
-#define MTRRIOC_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry)
-#define MTRRIOC_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry)
-#define MTRRIOC_KILL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry)
-
-/* These are the region types */
-#define MTRR_TYPE_UNCACHABLE 0
-#define MTRR_TYPE_WRCOMB 1
-/*#define MTRR_TYPE_ 2*/
-/*#define MTRR_TYPE_ 3*/
-#define MTRR_TYPE_WRTHROUGH 4
-#define MTRR_TYPE_WRPROT 5
-#define MTRR_TYPE_WRBACK 6
-#define MTRR_NUM_TYPES 7
-
-#ifdef __KERNEL__
-
-/* The following functions are for use by other drivers */
-# ifdef CONFIG_MTRR
-extern u8 mtrr_type_lookup(u64 addr, u64 end);
-extern void mtrr_save_fixed_ranges(void *);
-extern void mtrr_save_state(void);
-extern int mtrr_add(unsigned long base, unsigned long size,
- unsigned int type, bool increment);
-extern int mtrr_add_page(unsigned long base, unsigned long size,
- unsigned int type, bool increment);
-extern int mtrr_del(int reg, unsigned long base, unsigned long size);
-extern int mtrr_del_page(int reg, unsigned long base, unsigned long size);
-extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
-extern void mtrr_ap_init(void);
-extern void mtrr_bp_init(void);
-extern void set_mtrr_aps_delayed_init(void);
-extern void mtrr_aps_init(void);
-extern void mtrr_bp_restore(void);
-extern int mtrr_trim_uncached_memory(unsigned long end_pfn);
-extern int amd_special_default_mtrr(void);
-# else
-static inline u8 mtrr_type_lookup(u64 addr, u64 end)
-{
- /*
- * Return no-MTRRs:
- */
- return 0xff;
-}
-#define mtrr_save_fixed_ranges(arg) do {} while (0)
-#define mtrr_save_state() do {} while (0)
-static inline int mtrr_del(int reg, unsigned long base, unsigned long size)
-{
- return -ENODEV;
-}
-static inline int mtrr_del_page(int reg, unsigned long base, unsigned long size)
-{
- return -ENODEV;
-}
-static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
-{
- return 0;
-}
-static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
-{
-}
-
-#define mtrr_ap_init() do {} while (0)
-#define mtrr_bp_init() do {} while (0)
-#define set_mtrr_aps_delayed_init() do {} while (0)
-#define mtrr_aps_init() do {} while (0)
-#define mtrr_bp_restore() do {} while (0)
-# endif
-
-#ifdef CONFIG_COMPAT
-#include <linux/compat.h>
-
-struct mtrr_sentry32 {
- compat_ulong_t base; /* Base address */
- compat_uint_t size; /* Size of region */
- compat_uint_t type; /* Type of region */
-};
-
-struct mtrr_gentry32 {
- compat_ulong_t regnum; /* Register number */
- compat_uint_t base; /* Base address */
- compat_uint_t size; /* Size of region */
- compat_uint_t type; /* Type of region */
-};
-
-#define MTRR_IOCTL_BASE 'M'
-
-#define MTRRIOC32_ADD_ENTRY _IOW(MTRR_IOCTL_BASE, 0, struct mtrr_sentry32)
-#define MTRRIOC32_SET_ENTRY _IOW(MTRR_IOCTL_BASE, 1, struct mtrr_sentry32)
-#define MTRRIOC32_DEL_ENTRY _IOW(MTRR_IOCTL_BASE, 2, struct mtrr_sentry32)
-#define MTRRIOC32_GET_ENTRY _IOWR(MTRR_IOCTL_BASE, 3, struct mtrr_gentry32)
-#define MTRRIOC32_KILL_ENTRY _IOW(MTRR_IOCTL_BASE, 4, struct mtrr_sentry32)
-#define MTRRIOC32_ADD_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 5, struct mtrr_sentry32)
-#define MTRRIOC32_SET_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 6, struct mtrr_sentry32)
-#define MTRRIOC32_DEL_PAGE_ENTRY _IOW(MTRR_IOCTL_BASE, 7, struct mtrr_sentry32)
-#define MTRRIOC32_GET_PAGE_ENTRY _IOWR(MTRR_IOCTL_BASE, 8, struct mtrr_gentry32)
-#define MTRRIOC32_KILL_PAGE_ENTRY \
- _IOW(MTRR_IOCTL_BASE, 9, struct mtrr_sentry32)
-#endif /* CONFIG_COMPAT */
-
-#endif /* __KERNEL__ */
-
-#endif /* __ASSEMBLY__ */
-
-#endif /* _ASM_X86_MTRR_H */
+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);
+int x86_mtrr_check(void);
+/* ROM caching can be used after variable MTRRs are set up. Beware that
+ * enabling CONFIG_CACHE_ROM will eat through quite a few MTRRs based on
+ * one's IO hole size and WRCOMB resources. Be sure to check the console
+ * log when enabling CONFIG_CACHE_ROM or adding WRCOMB resources. Beware that
+ * on CPUs with core-scoped MTRR registers such as hyperthreaded CPUs the
+ * rom caching will be disabled if all threads run the MTRR code. Therefore,
+ * one needs to call x86_mtrr_enable_rom_caching() after all threads of the
+ * same core have run the MTRR code. */
+#if CONFIG_CACHE_ROM
+void x86_mtrr_enable_rom_caching(void);
+void x86_mtrr_disable_rom_caching(void);
+/* Return the variable range MTRR index of the ROM cache. */
+long x86_mtrr_rom_cache_var_index(void);
+#else
+static inline void x86_mtrr_enable_rom_caching(void) {}
+static inline void x86_mtrr_disable_rom_caching(void) {}
+static inline long x86_mtrr_rom_cache_var_index(void) { return -1; }
+#endif /* CONFIG_CACHE_ROM */
+
+#endif
+
+#if !defined(CONFIG_RAMTOP)
+# error "CONFIG_RAMTOP not defined"
+#endif
+
+#if ((CONFIG_XIP_ROM_SIZE & (CONFIG_XIP_ROM_SIZE - 1)) != 0)
+# error "CONFIG_XIP_ROM_SIZE is not a power of 2"
+#endif
+
+#if ((CONFIG_CACHE_ROM_SIZE & (CONFIG_CACHE_ROM_SIZE - 1)) != 0)
+# error "CONFIG_CACHE_ROM_SIZE is not a power of 2"
+#endif
+
+#define CACHE_ROM_BASE (((1 << 20) - (CONFIG_CACHE_ROM_SIZE >> 12)) << 12)
+
+#if (CONFIG_RAMTOP & (CONFIG_RAMTOP - 1)) != 0
+# error "CONFIG_RAMTOP must be a power of 2"
+#endif
+
+#endif
projects / karo-tx-uboot.git / blobdiff