08190ef7de
Until now, ubldr has been trying to locate the U-Boot API using a hint address (U-Boot's current stack pointer), aligning it to 1MiB and going over a 3MiB (or 1MiB in case of MIPS) memory region searching for a valid API signature. This change introduces an alternative way of doing this, namely the following: - both U-Boot's bootelf and go commands actually pass argc and argv to the entry point (e.g., ubldr's start function, but they should also be passed over to main() transparently) - so, instead of trying to go and look for a valid API signature, we look at the parameters passed to main() - if there's an option '-a' with argument, which is a valid hexadecimal unsigned long number (x), we try to verify whether we have a valid API signature at address x. If so - we use it. If not - we fallback to the original way of locating the API signature. The U-Boot change, which causes the API structure address to be exported as an environment variable, was committed to mainline U-Boot as commit 22aa61f707574dd569296f521fcfc46a05f51c48 Reviewed by: andrew, adrian Approved by: adrian (mentor) Sponsored by: Smartcom - Bulgaria AD Differential Revision: https://reviews.freebsd.org/D5492
108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/*-
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* Copyright (c) 2008 Semihalf, Rafal Jaworowski <raj@semihalf.com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* This is the header file for conveniency wrapper routines (API glue)
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*/
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#ifndef _API_GLUE_H_
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#define _API_GLUE_H_
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#include "api_public.h"
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/*
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* Mask used to align the start address for API signature search to 1MiB
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*/
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#define API_SIG_SEARCH_MASK ~0x000fffff
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#ifdef __mips__
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/*
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* On MIPS, U-Boot passes us a hint address, which is very close to the end of
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* RAM (less than 1MiB), so searching for the API signature within more than
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* that leads to exception.
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*/
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#define API_SIG_SEARCH_LEN 0x00100000
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#else
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/*
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* Search for the API signature within 3MiB of the 1MiB-aligned address that
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* U-Boot has hinted us.
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*/
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#define API_SIG_SEARCH_LEN 0x00300000
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#endif
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int syscall(int, int *, ...);
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void *syscall_ptr;
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int api_parse_cmdline_sig(int argc, char **argv, struct api_signature **sig);
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int api_search_sig(struct api_signature **sig);
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#define UB_MAX_MR 16 /* max mem regions number */
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#define UB_MAX_DEV 6 /* max devices number */
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/*
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* The ub_ library calls are part of the application, not U-Boot code! They
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* are front-end wrappers that are used by the consumer application: they
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* prepare arguments for particular syscall and jump to the low level
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* syscall()
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*/
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/* console */
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int ub_getc(void);
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int ub_tstc(void);
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void ub_putc(char);
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void ub_puts(const char *);
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/* system */
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void ub_reset(void);
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struct sys_info *ub_get_sys_info(void);
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/* time */
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void ub_udelay(unsigned long);
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unsigned long ub_get_timer(unsigned long);
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/* env vars */
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char *ub_env_get(const char *);
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void ub_env_set(const char *, char *);
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const char *ub_env_enum(const char *);
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/* devices */
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int ub_dev_enum(void);
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int ub_dev_open(int);
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int ub_dev_close(int);
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int ub_dev_read(int, void *, lbasize_t, lbastart_t, lbasize_t *);
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int ub_dev_send(int, void *, int);
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int ub_dev_recv(int, void *, int, int *);
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struct device_info *ub_dev_get(int);
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void ub_dump_di(int);
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void ub_dump_si(struct sys_info *);
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char *ub_mem_type(int);
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char *ub_stor_type(int);
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#endif /* _API_GLUE_H_ */
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