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// SPDX-License-Identifier: GPL-2.0
#include <common.h>
#include <asm/sections.h>
#include <linux/sizes.h>
#include <asm/ns16550.h>
#include <pbl.h>
#include <fdt.h>
#if __riscv_xlen == 64
#define IMAGE_LOAD_OFFSET 0x200000 /* Image load offset(2MB) from start of RAM */
#else
#define IMAGE_LOAD_OFFSET 0x400000 /* Image load offset(4MB) from start of RAM */
#endif
/* because we can depend on being loaded at an offset, we can just use
* our load address as stack top
*/
#define __barebox_riscv_head() \
__barebox_riscv_header("auipc sp, 0", IMAGE_LOAD_OFFSET, \
RISCV_HEADER_VERSION, "RISCV", RISCV_IMAGE_MAGIC2)
#include <asm/barebox-riscv.h>
static void virt_ns16550_putc(void *base, int ch)
{
early_ns16550_putc(ch, base, 0, readb, writeb);
}
static void virt_ns16550_init(void)
{
void __iomem *base = IOMEM(0x10000000);
early_ns16550_init(base, 3686400 / CONFIG_BAUDRATE, 0, writeb);
pbl_set_putc(virt_ns16550_putc, base);
}
static const struct fdt_device_id console_ids[] = {
{ .compatible = "riscv-virtio", .data = virt_ns16550_init },
{ /* sentinel */ }
};
ENTRY_FUNCTION(start_dt_2nd, a0, _fdt, a2)
{
unsigned long membase, memsize, endmem, endfdt, uncompressed_len;
struct fdt_header *fdt = (void *)_fdt;
void (*pbl_uart_init)(void);
if (!fdt)
hang();
relocate_to_current_adr();
setup_c();
pbl_uart_init = fdt_device_get_match_data(fdt, "/", console_ids);
if (pbl_uart_init) {
pbl_uart_init();
putchar('>');
}
fdt_find_mem(fdt, &membase, &memsize);
endmem = membase + memsize;
endfdt = _fdt + be32_to_cpu(fdt->totalsize);
/*
* QEMU likes to place the FDT at the end of RAM, where barebox
* would normally extract itself to. Accommodate this by moving
* memory end, so it doesn't overlap FDT
*/
uncompressed_len = input_data_len() + MAX_BSS_SIZE;
if (riscv_mem_barebox_image(membase, endmem, uncompressed_len) < endfdt &&
_fdt < riscv_mem_stack_top(membase, endmem))
memsize = ALIGN_DOWN(_fdt - membase, SZ_1M);
barebox_riscv_entry(membase, memsize, fdt);
}
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