151 lines
4.2 KiB
C
151 lines
4.2 KiB
C
/*
|
|
* This file is part of the libpayload project.
|
|
*
|
|
* Copyright (C) 2008 Advanced Micro Devices, Inc.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <exception.h>
|
|
#include <libpayload.h>
|
|
#include <arch/mmu.h>
|
|
|
|
int main_argc; /**< The argc value to pass to main() */
|
|
|
|
/** The argv value to pass to main() */
|
|
char *main_argv[MAX_ARGC_COUNT];
|
|
|
|
unsigned int test_exc;
|
|
|
|
static int test_exception(void)
|
|
{
|
|
uint64_t *a = (uint64_t *)0xfffffffff0000000ULL;
|
|
|
|
test_exc = 1;
|
|
|
|
printf("%llx\n", *a);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Func: pre_sysinfo_scan_mmu_setup
|
|
* Desc: We need to setup and enable MMU before we can go to scan coreboot
|
|
* tables. However, we are not sure what all memory regions to map. Thus,
|
|
* initializing minimum required memory ranges
|
|
*/
|
|
static void pre_sysinfo_scan_mmu_setup(void)
|
|
{
|
|
uint64_t start = (uint64_t)&_start;
|
|
uint64_t end = (uint64_t)&_end;
|
|
|
|
/* Memory range 1: Covers the area occupied by payload */
|
|
mmu_presysinfo_memory_used(start, end - start);
|
|
|
|
/*
|
|
* Memory range 2: coreboot tables
|
|
*
|
|
* Maximum size is assumed 2 pages in case it crosses the GRANULE_SIZE
|
|
* boundary
|
|
*/
|
|
mmu_presysinfo_memory_used((uint64_t)get_cb_header_ptr(),
|
|
2 * GRANULE_SIZE);
|
|
|
|
mmu_presysinfo_enable();
|
|
}
|
|
|
|
/*
|
|
* Func: post_sysinfo_scan_mmu_setup
|
|
* Desc: Once we have scanned coreboot tables, we have complete information
|
|
* about different memory ranges. Thus, we can perform a complete mmu
|
|
* initialization. Also, this takes care of DMA area setup
|
|
*/
|
|
static void post_sysinfo_scan_mmu_setup(void)
|
|
{
|
|
struct memrange *ranges;
|
|
uint64_t nranges;
|
|
struct mmu_ranges mmu_ranges;
|
|
struct mmu_memrange *dma_range;
|
|
|
|
/* Get memrange info from lib_sysinfo */
|
|
lib_sysinfo_get_memranges(&ranges, &nranges);
|
|
|
|
/* Get memory ranges for mmu init from lib_sysinfo memrange */
|
|
dma_range = mmu_init_ranges_from_sysinfo(ranges, nranges, &mmu_ranges);
|
|
|
|
/* Disable mmu */
|
|
mmu_disable();
|
|
|
|
/* Init mmu */
|
|
mmu_init(&mmu_ranges);
|
|
|
|
/* Enable mmu */
|
|
mmu_enable();
|
|
|
|
/* Init dma memory */
|
|
init_dma_memory((void *)dma_range->base, dma_range->size);
|
|
}
|
|
|
|
/**
|
|
* This is our C entry function - set up the system
|
|
* and jump into the payload entry point.
|
|
*/
|
|
void start_main(void);
|
|
void start_main(void)
|
|
{
|
|
extern int main(int argc, char **argv);
|
|
|
|
pre_sysinfo_scan_mmu_setup();
|
|
|
|
/* Gather system information. */
|
|
lib_get_sysinfo();
|
|
|
|
post_sysinfo_scan_mmu_setup();
|
|
|
|
#if !CONFIG(LP_SKIP_CONSOLE_INIT)
|
|
console_init();
|
|
#endif
|
|
|
|
printf("ARM64: Libpayload %s\n",__func__);
|
|
exception_init();
|
|
|
|
test_exception();
|
|
/*
|
|
* Any other system init that has to happen before the
|
|
* user gets control goes here.
|
|
*/
|
|
|
|
/*
|
|
* Go to the entry point.
|
|
* In the future we may care about the return value.
|
|
*/
|
|
|
|
(void) main(main_argc, (main_argc != 0) ? main_argv : NULL);
|
|
|
|
/*
|
|
* Returning here will go to the _leave function to return
|
|
* us to the original context.
|
|
*/
|
|
}
|