mirror of
https://github.com/AsahiLinux/u-boot
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9558b48af0
Allow redirection of console output prior to console initialisation to a temporary buffer. To enable this functionality, the board (or arch) must define: - CONFIG_PRE_CONSOLE_BUFFER - Enable pre-console buffer - CONFIG_PRE_CON_BUF_ADDR - Base address of pre-console buffer - CONFIG_PRE_CON_BUF_SZ - Size of pre-console buffer (in bytes) The pre-console buffer will buffer the last CONFIG_PRE_CON_BUF_SZ bytes Any earlier characters are silently dropped.
105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/*
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* (C) Copyright 2002-2010
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*/
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#ifndef __ASM_GBL_DATA_H
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#define __ASM_GBL_DATA_H
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/*
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* The following data structure is placed in some memory wich is
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* available very early after boot (like DPRAM on MPC8xx/MPC82xx, or
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* some locked parts of the data cache) to allow for a minimum set of
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* global variables during system initialization (until we have set
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* up the memory controller so that we can use RAM).
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*
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* Keep it *SMALL* and remember to set GENERATED_GBL_DATA_SIZE > sizeof(gd_t)
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*/
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#ifndef __ASSEMBLY__
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typedef struct global_data {
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bd_t *bd;
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unsigned long flags;
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unsigned long baudrate;
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unsigned long have_console; /* serial_init() was called */
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#ifdef CONFIG_PRE_CONSOLE_BUFFER
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unsigned long precon_buf_idx; /* Pre-Console buffer index */
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#endif
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unsigned long reloc_off; /* Relocation Offset */
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unsigned long load_off; /* Load Offset */
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unsigned long env_addr; /* Address of Environment struct */
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unsigned long env_valid; /* Checksum of Environment valid? */
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unsigned long cpu_clk; /* CPU clock in Hz! */
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unsigned long bus_clk;
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unsigned long relocaddr; /* Start address of U-Boot in RAM */
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unsigned long start_addr_sp; /* start_addr_stackpointer */
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phys_size_t ram_size; /* RAM size */
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unsigned long reset_status; /* reset status register at boot */
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void **jt; /* jump table */
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char env_buf[32]; /* buffer for getenv() before reloc. */
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} gd_t;
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extern gd_t *gd;
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#endif
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/* Word Offsets into Global Data - MUST match struct gd_t */
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#define GD_BD 0
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#define GD_FLAGS 1
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#define GD_BAUDRATE 2
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#define GD_HAVE_CONSOLE 3
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#define GD_RELOC_OFF 4
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#define GD_LOAD_OFF 5
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#define GD_ENV_ADDR 6
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#define GD_ENV_VALID 7
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#define GD_CPU_CLK 8
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#define GD_BUS_CLK 9
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#define GD_RELOC_ADDR 10
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#define GD_START_ADDR_SP 11
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#define GD_RAM_SIZE 12
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#define GD_RESET_STATUS 13
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#define GD_JT 14
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#define GD_SIZE 15
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/*
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* Global Data Flags
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*/
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#define GD_FLG_RELOC 0x00001 /* Code was relocated to RAM */
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#define GD_FLG_DEVINIT 0x00002 /* Devices have been initialized */
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#define GD_FLG_SILENT 0x00004 /* Silent mode */
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#define GD_FLG_POSTFAIL 0x00008 /* Critical POST test failed */
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#define GD_FLG_POSTSTOP 0x00010 /* POST seqeunce aborted */
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#define GD_FLG_LOGINIT 0x00020 /* Log Buffer has been initialized */
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#define GD_FLG_DISABLE_CONSOLE 0x00040 /* Disable console (in & out) */
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#define GD_FLG_ENV_READY 0x00080 /* Environment imported into hash table */
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#define GD_FLG_COLD_BOOT 0x00100 /* Cold Boot */
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#define GD_FLG_WARM_BOOT 0x00200 /* Warm Boot */
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#if 0
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#define DECLARE_GLOBAL_DATA_PTR
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#else
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#define XTRN_DECLARE_GLOBAL_DATA_PTR extern
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#define DECLARE_GLOBAL_DATA_PTR XTRN_DECLARE_GLOBAL_DATA_PTR \
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gd_t *gd
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#endif
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#endif /* __ASM_GBL_DATA_H */
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