mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-30 16:40:44 +09:00
d59476b644
If we are to have driver model before relocation we need to support some way of calling memory allocation routines. The standard malloc() is pretty complicated: 1. It uses some BSS memory for its state, and BSS is not available before relocation 2. It supports algorithms for reducing memory fragmentation and improving performace of free(). Before relocation we could happily just not support free(). 3. It includes about 4KB of code (Thumb 2) and 1KB of data. However since this has been loaded anyway this is not really a problem. The simplest way to support pre-relocation malloc() is to reserve an area of memory and allocate it in increasing blocks as needed. This implementation does this. To enable it, you need to define the size of the malloc() pool as described in the README. It will be located above the pre-relocation stack on supported architectures. Note that this implementation is only useful on machines which have some memory available before dram_init() is called - this includes those that do no DRAM init (like tegra) and those that do it in SPL (quite a few boards). Enabling driver model preior to relocation for the rest of the boards is left for a later exercise. Signed-off-by: Simon Glass <sjg@chromium.org>
110 lines
3.7 KiB
C
110 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2012 The Chromium OS Authors.
|
|
* (C) Copyright 2002-2010
|
|
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#ifndef __ASM_GENERIC_GBL_DATA_H
|
|
#define __ASM_GENERIC_GBL_DATA_H
|
|
/*
|
|
* The following data structure is placed in some memory which is
|
|
* available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
|
|
* some locked parts of the data cache) to allow for a minimum set of
|
|
* global variables during system initialization (until we have set
|
|
* up the memory controller so that we can use RAM).
|
|
*
|
|
* Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
|
|
*
|
|
* Each architecture has its own private fields. For now all are private
|
|
*/
|
|
|
|
#ifndef __ASSEMBLY__
|
|
#include <linux/list.h>
|
|
|
|
typedef struct global_data {
|
|
bd_t *bd;
|
|
unsigned long flags;
|
|
unsigned int baudrate;
|
|
unsigned long cpu_clk; /* CPU clock in Hz! */
|
|
unsigned long bus_clk;
|
|
/* We cannot bracket this with CONFIG_PCI due to mpc5xxx */
|
|
unsigned long pci_clk;
|
|
unsigned long mem_clk;
|
|
#if defined(CONFIG_LCD) || defined(CONFIG_VIDEO)
|
|
unsigned long fb_base; /* Base address of framebuffer mem */
|
|
#endif
|
|
#if defined(CONFIG_POST) || defined(CONFIG_LOGBUFFER)
|
|
unsigned long post_log_word; /* Record POST activities */
|
|
unsigned long post_log_res; /* success of POST test */
|
|
unsigned long post_init_f_time; /* When post_init_f started */
|
|
#endif
|
|
#ifdef CONFIG_BOARD_TYPES
|
|
unsigned long board_type;
|
|
#endif
|
|
unsigned long have_console; /* serial_init() was called */
|
|
#ifdef CONFIG_PRE_CONSOLE_BUFFER
|
|
unsigned long precon_buf_idx; /* Pre-Console buffer index */
|
|
#endif
|
|
#ifdef CONFIG_MODEM_SUPPORT
|
|
unsigned long do_mdm_init;
|
|
unsigned long be_quiet;
|
|
#endif
|
|
unsigned long env_addr; /* Address of Environment struct */
|
|
unsigned long env_valid; /* Checksum of Environment valid? */
|
|
|
|
unsigned long ram_top; /* Top address of RAM used by U-Boot */
|
|
|
|
unsigned long relocaddr; /* Start address of U-Boot in RAM */
|
|
phys_size_t ram_size; /* RAM size */
|
|
unsigned long mon_len; /* monitor len */
|
|
unsigned long irq_sp; /* irq stack pointer */
|
|
unsigned long start_addr_sp; /* start_addr_stackpointer */
|
|
unsigned long reloc_off;
|
|
struct global_data *new_gd; /* relocated global data */
|
|
|
|
#ifdef CONFIG_DM
|
|
struct udevice *dm_root;/* Root instance for Driver Model */
|
|
struct list_head uclass_root; /* Head of core tree */
|
|
#endif
|
|
|
|
const void *fdt_blob; /* Our device tree, NULL if none */
|
|
void *new_fdt; /* Relocated FDT */
|
|
unsigned long fdt_size; /* Space reserved for relocated FDT */
|
|
void **jt; /* jump table */
|
|
char env_buf[32]; /* buffer for getenv() before reloc. */
|
|
#ifdef CONFIG_TRACE
|
|
void *trace_buff; /* The trace buffer */
|
|
#endif
|
|
#if defined(CONFIG_SYS_I2C)
|
|
int cur_i2c_bus; /* current used i2c bus */
|
|
#endif
|
|
#ifdef CONFIG_SYS_I2C_MXC
|
|
void *srdata[10];
|
|
#endif
|
|
unsigned long timebase_h;
|
|
unsigned long timebase_l;
|
|
#ifdef CONFIG_SYS_MALLOC_F_LEN
|
|
unsigned long malloc_base; /* base address of early malloc() */
|
|
unsigned long malloc_limit; /* limit address */
|
|
unsigned long malloc_ptr; /* current address */
|
|
#endif
|
|
struct arch_global_data arch; /* architecture-specific data */
|
|
} gd_t;
|
|
#endif
|
|
|
|
/*
|
|
* Global Data Flags
|
|
*/
|
|
#define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */
|
|
#define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */
|
|
#define GD_FLG_SILENT 0x00004 /* Silent mode */
|
|
#define GD_FLG_POSTFAIL 0x00008 /* Critical POST test failed */
|
|
#define GD_FLG_POSTSTOP 0x00010 /* POST seqeunce aborted */
|
|
#define GD_FLG_LOGINIT 0x00020 /* Log Buffer has been initialized */
|
|
#define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */
|
|
#define GD_FLG_ENV_READY 0x00080 /* Env. imported into hash table */
|
|
|
|
#endif /* __ASM_GENERIC_GBL_DATA_H */
|