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hw/riscv: Split out the boot functions

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Split the common RISC-V boot functions into a seperate file. This allows
us to share the common code.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Alistair Francis 2019-06-24 15:11:49 -07:00 • committed by Palmer Dabbelt
parent 05446f4133
commit 0ac24d56c5
No known key found for this signature in database
GPG key ID: EF4CA1502CCBAB41
7 changed files with 110 additions and 93 deletions
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51
hw/riscv/virt.c
View file

@ -34,13 +34,13 @@
#include "hw/riscv/sifive_clint.h"
#include "hw/riscv/sifive_test.h"
#include "hw/riscv/virt.h"
#include "hw/riscv/boot.h"
#include "chardev/char.h"
#include "sysemu/arch_init.h"
#include "sysemu/device_tree.h"
#include "exec/address-spaces.h"
#include "hw/pci/pci.h"
#include "hw/pci-host/gpex.h"
#include "elf.h"
#include <libfdt.h>
@ -61,47 +61,6 @@ static const struct MemmapEntry {
[VIRT_PCIE_ECAM] = { 0x30000000, 0x10000000 },
};
static target_ulong load_kernel(const char *kernel_filename)
{
uint64_t kernel_entry, kernel_high;
if (load_elf(kernel_filename, NULL, NULL, NULL,
&kernel_entry, NULL, &kernel_high,
0, EM_RISCV, 1, 0) < 0) {
error_report("could not load kernel '%s'", kernel_filename);
exit(1);
}
return kernel_entry;
}
static hwaddr load_initrd(const char *filename, uint64_t mem_size,
uint64_t kernel_entry, hwaddr *start)
{
int size;
/* We want to put the initrd far enough into RAM that when the
* kernel is uncompressed it will not clobber the initrd. However
* on boards without much RAM we must ensure that we still leave
* enough room for a decent sized initrd, and on boards with large
* amounts of RAM we must avoid the initrd being so far up in RAM
* that it is outside lowmem and inaccessible to the kernel.
* So for boards with less than 256MB of RAM we put the initrd
* halfway into RAM, and for boards with 256MB of RAM or more we put
* the initrd at 128MB.
*/
*start = kernel_entry + MIN(mem_size / 2, 128 * MiB);
size = load_ramdisk(filename, *start, mem_size - *start);
if (size == -1) {
size = load_image_targphys(filename, *start, mem_size - *start);
if (size == -1) {
error_report("could not load ramdisk '%s'", filename);
exit(1);
}
}
return *start + size;
}
static void create_pcie_irq_map(void *fdt, char *nodename,
uint32_t plic_phandle)
{
@ -440,13 +399,13 @@ static void riscv_virt_board_init(MachineState *machine)
mask_rom);
if (machine->kernel_filename) {
uint64_t kernel_entry = load_kernel(machine->kernel_filename);
uint64_t kernel_entry = riscv_load_kernel(machine->kernel_filename);
if (machine->initrd_filename) {
hwaddr start;
hwaddr end = load_initrd(machine->initrd_filename,
machine->ram_size, kernel_entry,
&start);
hwaddr end = riscv_load_initrd(machine->initrd_filename,
machine->ram_size, kernel_entry,
&start);
qemu_fdt_setprop_cell(fdt, "/chosen",
"linux,initrd-start", start);
qemu_fdt_setprop_cell(fdt, "/chosen", "linux,initrd-end",