+/* SPDX-License-Identifier: GPL-2.0+ */
/*
- * 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>
- *
- * SPDX-License-Identifier: GPL-2.0+
+ * From Coreboot file of the same name
*/
-#ifndef _ASM_X86_MTRR_H
-#define _ASM_X86_MTRR_H
+#ifndef _ASM_MTRR_H
+#define _ASM_MTRR_H
-#define MTRRphysBase_MSR(reg) (0x200 + 2 * (reg))
-#define MTRRphysMask_MSR(reg) (0x200 + 2 * (reg) + 1)
+/* MTRR 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
-#ifndef __ASSEMBLY__
+#define MTRR_TYPE_COUNT 7
-#include <linux/types.h>
-#include <linux/ioctl.h>
-#include <errno.h>
+#define MTRR_CAP_MSR 0x0fe
+#define MTRR_DEF_TYPE_MSR 0x2ff
-#define MTRR_IOCTL_BASE 'M'
+#define MTRR_CAP_SMRR (1 << 11)
+#define MTRR_CAP_WC (1 << 10)
+#define MTRR_CAP_FIX (1 << 8)
+#define MTRR_CAP_VCNT_MASK 0xff
-struct mtrr_sentry {
- unsigned long base; /* Base address */
- unsigned int size; /* Size of region */
- unsigned int type; /* Type of region */
-};
+#define MTRR_DEF_TYPE_EN (1 << 11)
+#define MTRR_DEF_TYPE_FIX_EN (1 << 10)
-/*
- * 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.
- */
+#define MTRR_PHYS_BASE_MSR(reg) (0x200 + 2 * (reg))
+#define MTRR_PHYS_MASK_MSR(reg) (0x200 + 2 * (reg) + 1)
-#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 */
-};
+#define MTRR_PHYS_MASK_VALID (1 << 11)
-#else /* __i386__ */
+#define MTRR_BASE_TYPE_MASK 0x7
-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__ */
+/* Number of MTRRs supported */
+#define MTRR_COUNT 8
-struct mtrr_var_range {
- __u32 base_lo;
- __u32 base_hi;
- __u32 mask_lo;
- __u32 mask_hi;
-};
+#define NUM_FIXED_MTRRS 11
+#define RANGES_PER_FIXED_MTRR 8
+#define NUM_FIXED_RANGES (NUM_FIXED_MTRRS * RANGES_PER_FIXED_MTRR)
-/*
- * In the Intel processor's MTRR interface, the MTRR type is always held in
- * an 8 bit field:
- */
-typedef __u8 mtrr_type;
+#define MTRR_FIX_64K_00000_MSR 0x250
+#define MTRR_FIX_16K_80000_MSR 0x258
+#define MTRR_FIX_16K_A0000_MSR 0x259
+#define MTRR_FIX_4K_C0000_MSR 0x268
+#define MTRR_FIX_4K_C8000_MSR 0x269
+#define MTRR_FIX_4K_D0000_MSR 0x26a
+#define MTRR_FIX_4K_D8000_MSR 0x26b
+#define MTRR_FIX_4K_E0000_MSR 0x26c
+#define MTRR_FIX_4K_E8000_MSR 0x26d
+#define MTRR_FIX_4K_F0000_MSR 0x26e
+#define MTRR_FIX_4K_F8000_MSR 0x26f
-#define MTRR_NUM_FIXED_RANGES 88
-#define MTRR_MAX_VAR_RANGES 256
+#define MTRR_FIX_TYPE(t) ((t << 24) | (t << 16) | (t << 8) | t)
-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;
-};
+#if !defined(__ASSEMBLER__)
-/* 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 */
+/**
+ * Information about the previous MTRR state, set up by mtrr_open()
+ *
+ * @deftype: Previous value of MTRR_DEF_TYPE_MSR
+ * @enable_cache: true if cache was enabled
+ */
+struct mtrr_state {
+ uint64_t deftype;
+ bool enable_cache;
};
-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 */
-};
+/**
+ * mtrr_open() - Prepare to adjust MTRRs
+ *
+ * Use mtrr_open() passing in a structure - this function will init it. Then
+ * when done, pass the same structure to mtrr_close() to re-enable MTRRs and
+ * possibly the cache.
+ *
+ * @state: Empty structure to pass in to hold settings
+ * @do_caches: true to disable caches before opening
+ */
+void mtrr_open(struct mtrr_state *state, bool do_caches);
+
+/**
+ * mtrr_open() - Clean up after adjusting MTRRs, and enable them
+ *
+ * This uses the structure containing information returned from mtrr_open().
+ *
+ * @state: Structure from mtrr_open()
+ * @state: true to restore cache state to that before mtrr_open()
+ */
+void mtrr_close(struct mtrr_state *state, bool do_caches);
+
+/**
+ * mtrr_add_request() - Add a new MTRR request
+ *
+ * This adds a request for a memory region to be set up in a particular way.
+ *
+ * @type: Requested type (MTRR_TYPE_)
+ * @start: Start address
+ * @size: Size
+ *
+ * @return: 0 on success, non-zero on failure
+ */
+int mtrr_add_request(int type, uint64_t start, uint64_t size);
+
+/**
+ * mtrr_commit() - set up the MTRR registers based on current requests
+ *
+ * This sets up MTRRs for the available DRAM and the requests received so far.
+ * It must be called with caches disabled.
+ *
+ * @do_caches: true if caches are currently on
+ *
+ * @return: 0 on success, non-zero on failure
+ */
+int mtrr_commit(bool do_caches);
-#define MTRR_IOCTL_BASE 'M'
+#endif
-#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 */
+#if ((CONFIG_XIP_ROM_SIZE & (CONFIG_XIP_ROM_SIZE - 1)) != 0)
+# error "CONFIG_XIP_ROM_SIZE is not a power of 2"
+#endif
-#endif /* __KERNEL__ */
+#if ((CONFIG_CACHE_ROM_SIZE & (CONFIG_CACHE_ROM_SIZE - 1)) != 0)
+# error "CONFIG_CACHE_ROM_SIZE is not a power of 2"
+#endif
-#endif /* __ASSEMBLY__ */
+#define CACHE_ROM_BASE (((1 << 20) - (CONFIG_CACHE_ROM_SIZE >> 12)) << 12)
-#endif /* _ASM_X86_MTRR_H */
+#endif
projects / oweals / u-boot.git / blobdiff