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// SPDX-License-Identifier: GPL-2.0-only
// SPDX-FileCopyrightText: 2010 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
#define pr_fmt(fmt) "start.c: " fmt
#include <common.h>
#include <init.h>
#include <linux/sizes.h>
#include <of.h>
#include <asm/barebox-riscv.h>
#include <asm-generic/memory_layout.h>
#include <asm/sections.h>
#include <asm/unaligned.h>
#include <linux/kasan.h>
#include <memory.h>
#include <uncompress.h>
#include <malloc.h>
#include <compressed-dtb.h>
#include <debug_ll.h>
#include "entry.h"
unsigned long riscv_stack_top;
static unsigned long riscv_barebox_size;
static unsigned long riscv_endmem;
static void *barebox_boarddata;
static unsigned long barebox_boarddata_size;
void *barebox_riscv_boot_dtb(void)
{
void *dtb;
void *data;
int ret;
struct barebox_boarddata_compressed_dtb *compressed_dtb;
static void *boot_dtb;
if (boot_dtb)
return boot_dtb;
if (barebox_boarddata && blob_is_fdt(barebox_boarddata)) {
pr_debug("%s: using barebox_boarddata\n", __func__);
return barebox_boarddata;
}
if (!fdt_blob_can_be_decompressed(barebox_boarddata))
return NULL;
compressed_dtb = barebox_boarddata;
pr_debug("%s: using compressed_dtb\n", __func__);
dtb = malloc(compressed_dtb->datalen_uncompressed);
if (!dtb)
return NULL;
data = compressed_dtb + 1;
ret = uncompress(data, compressed_dtb->datalen, NULL, NULL, dtb, NULL, NULL);
if (ret) {
pr_err("uncompressing dtb failed\n");
free(dtb);
return NULL;
}
boot_dtb = dtb;
return boot_dtb;
}
static inline unsigned long riscv_mem_boarddata(unsigned long membase,
unsigned long endmem,
unsigned long size)
{
unsigned long mem;
mem = riscv_mem_barebox_image(membase, endmem, riscv_barebox_size);
mem -= ALIGN(size, 64);
return mem;
}
unsigned long riscv_mem_ramoops_get(void)
{
return riscv_mem_ramoops(0, riscv_stack_top);
}
EXPORT_SYMBOL_GPL(riscv_mem_ramoops_get);
unsigned long riscv_mem_endmem_get(void)
{
return riscv_endmem;
}
EXPORT_SYMBOL_GPL(riscv_mem_endmem_get);
static int barebox_memory_areas_init(void)
{
if(barebox_boarddata)
request_sdram_region("board data", (unsigned long)barebox_boarddata,
barebox_boarddata_size);
return 0;
}
device_initcall(barebox_memory_areas_init);
/*
* First function in the uncompressed image. We get here from
* the pbl. The stack already has been set up by the pbl.
*/
__noreturn __no_sanitize_address __section(.text_entry)
void barebox_non_pbl_start(unsigned long membase, unsigned long memsize, void *boarddata)
{
unsigned long endmem = membase + memsize;
unsigned long malloc_start, malloc_end;
unsigned long barebox_size = barebox_image_size + MAX_BSS_SIZE;
unsigned long barebox_base = riscv_mem_barebox_image(membase, endmem, barebox_size);
relocate_to_current_adr();
setup_c();
barrier();
pr_debug("memory at 0x%08lx, size 0x%08lx\n", membase, memsize);
riscv_endmem = endmem;
riscv_stack_top = riscv_mem_stack_top(membase, endmem);
riscv_barebox_size = barebox_size;
malloc_end = barebox_base;
if (boarddata) {
uint32_t totalsize = 0;
const char *name;
if (blob_is_fdt(boarddata)) {
totalsize = get_unaligned_be32(boarddata + 4);
name = "DTB";
} else if (blob_is_compressed_fdt(boarddata)) {
struct barebox_boarddata_compressed_dtb *bd = boarddata;
totalsize = bd->datalen + sizeof(*bd);
name = "Compressed DTB";
}
if (totalsize) {
unsigned long mem = riscv_mem_boarddata(membase, endmem, totalsize);
pr_debug("found %s in boarddata, copying to 0x%08lx\n", name, mem);
barebox_boarddata = memcpy((void *)mem, boarddata, totalsize);
barebox_boarddata_size = totalsize;
malloc_end = mem;
}
}
/*
* Maximum malloc space is the Kconfig value if given
* or 1GB.
*/
if (MALLOC_SIZE > 0) {
malloc_start = malloc_end - MALLOC_SIZE;
if (malloc_start < membase)
malloc_start = membase;
} else {
malloc_start = malloc_end - (malloc_end - membase) / 2;
if (malloc_end - malloc_start > SZ_1G)
malloc_start = malloc_end - SZ_1G;
}
pr_debug("initializing malloc pool at 0x%08lx (size 0x%08lx)\n",
malloc_start, malloc_end - malloc_start);
mem_malloc_init((void *)malloc_start, (void *)malloc_end - 1);
pr_debug("starting barebox...\n");
start_barebox();
}
void start(unsigned long membase, unsigned long memsize, void *boarddata);
/*
* First function in the uncompressed image. We get here from
* the pbl. The stack already has been set up by the pbl.
*/
void __no_sanitize_address __section(.text_entry) start(unsigned long membase,
unsigned long memsize, void *boarddata)
{
barebox_non_pbl_start(membase, memsize, boarddata);
}
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