mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-19 09:38:01 +09:00
8f3b9694b2
On x86 the global_data pointer is provided through a somewhat-bizarre and x86-specific mechanism: the F segment register is set to a pointer to the start of global_data, so that accesses can use this build-in register. When running as an EFI application we don't want to mess with the Global Descriptor Table (GDT) and there is little advantage (in terms of code size) to doing so. Allow global_data to be a simple variable in this case. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
108 lines
2.4 KiB
C
108 lines
2.4 KiB
C
/*
|
|
* (C) Copyright 2002-2010
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef __ASM_GBL_DATA_H
|
|
#define __ASM_GBL_DATA_H
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
enum pei_boot_mode_t {
|
|
PEI_BOOT_NONE = 0,
|
|
PEI_BOOT_SOFT_RESET,
|
|
PEI_BOOT_RESUME,
|
|
|
|
};
|
|
|
|
struct memory_area {
|
|
uint64_t start;
|
|
uint64_t size;
|
|
};
|
|
|
|
struct memory_info {
|
|
int num_areas;
|
|
uint64_t total_memory;
|
|
uint64_t total_32bit_memory;
|
|
struct memory_area area[CONFIG_NR_DRAM_BANKS];
|
|
};
|
|
|
|
#define MAX_MTRR_REQUESTS 8
|
|
|
|
/**
|
|
* A request for a memory region to be set up in a particular way. These
|
|
* requests are processed before board_init_r() is called. They are generally
|
|
* optional and can be ignored with some performance impact.
|
|
*/
|
|
struct mtrr_request {
|
|
int type; /* MTRR_TYPE_... */
|
|
uint64_t start;
|
|
uint64_t size;
|
|
};
|
|
|
|
/* Architecture-specific global data */
|
|
struct arch_global_data {
|
|
struct global_data *gd_addr; /* Location of Global Data */
|
|
uint8_t x86; /* CPU family */
|
|
uint8_t x86_vendor; /* CPU vendor */
|
|
uint8_t x86_model;
|
|
uint8_t x86_mask;
|
|
uint32_t x86_device;
|
|
uint64_t tsc_base; /* Initial value returned by rdtsc() */
|
|
uint32_t tsc_base_kclocks; /* Initial tsc as a kclocks value */
|
|
uint32_t tsc_prev; /* For show_boot_progress() */
|
|
uint32_t tsc_mhz; /* TSC frequency in MHz */
|
|
void *new_fdt; /* Relocated FDT */
|
|
uint32_t bist; /* Built-in self test value */
|
|
enum pei_boot_mode_t pei_boot_mode;
|
|
const struct pch_gpio_map *gpio_map; /* board GPIO map */
|
|
struct memory_info meminfo; /* Memory information */
|
|
#ifdef CONFIG_HAVE_FSP
|
|
void *hob_list; /* FSP HOB list */
|
|
#endif
|
|
struct mtrr_request mtrr_req[MAX_MTRR_REQUESTS];
|
|
int mtrr_req_count;
|
|
int has_mtrr;
|
|
/* MRC training data to save for the next boot */
|
|
char *mrc_output;
|
|
unsigned int mrc_output_len;
|
|
void *gdt; /* Global descriptor table */
|
|
};
|
|
|
|
#endif
|
|
|
|
#include <asm-generic/global_data.h>
|
|
|
|
#ifndef __ASSEMBLY__
|
|
# ifdef CONFIG_EFI_APP
|
|
|
|
#define gd global_data_ptr
|
|
|
|
#define DECLARE_GLOBAL_DATA_PTR extern struct global_data *global_data_ptr
|
|
# else
|
|
static inline __attribute__((no_instrument_function)) gd_t *get_fs_gd_ptr(void)
|
|
{
|
|
gd_t *gd_ptr;
|
|
|
|
asm volatile("fs movl 0, %0\n" : "=r" (gd_ptr));
|
|
|
|
return gd_ptr;
|
|
}
|
|
|
|
#define gd get_fs_gd_ptr()
|
|
|
|
#define DECLARE_GLOBAL_DATA_PTR
|
|
# endif
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Our private Global Data Flags
|
|
*/
|
|
#define GD_FLG_COLD_BOOT 0x10000 /* Cold Boot */
|
|
#define GD_FLG_WARM_BOOT 0x20000 /* Warm Boot */
|
|
|
|
#endif /* __ASM_GBL_DATA_H */
|