diff options
| author | Nick Kossifidis <mickflemm@gmail.com> | 2019-02-17 05:02:15 +0300 |
|---|---|---|
| committer | Anup Patel <anup@brainfault.org> | 2019-02-18 06:51:58 +0300 |
| commit | 51e543511a7425da1a5378e149de0b45928c7111 (patch) | |
| tree | 009d721dac74267a56069473cce5212224aaf004 /platform | |
| parent | b44878b773698f08b4c08b9e43e26917950a7618 (diff) | |
| download | opensbi-51e543511a7425da1a5378e149de0b45928c7111.tar.xz | |
platform: qemu-virt: Implement system shutdown
In order for QEMU to be compatible with Spike, it implements
a simple protocol used for reporting back the simulation's
status, through the memory-mapped "test finisher" device. We
use that protocol to make QEMU exit on system shutdown.
Signed-off-by: Nick Kossifidis <mick@ics.forth.gr>
Diffstat (limited to 'platform')
| -rw-r--r-- | platform/qemu/virt/platform.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/platform/qemu/virt/platform.c b/platform/qemu/virt/platform.c index 9dfd4d6..ab40b93 100644 --- a/platform/qemu/virt/platform.c +++ b/platform/qemu/virt/platform.c @@ -5,9 +5,11 @@ * * Authors: * Anup Patel <anup.patel@wdc.com> + * Nick Kossifidis <mick@ics.forth.gr> */ #include <sbi/riscv_encoding.h> +#include <sbi/riscv_io.h> #include <sbi/sbi_const.h> #include <sbi/sbi_hart.h> #include <sbi/sbi_platform.h> @@ -19,6 +21,8 @@ #define VIRT_HART_STACK_SIZE 8192 #define VIRT_TEST_ADDR 0x100000 +#define VIRT_TEST_FINISHER_FAIL 0x3333 +#define VIRT_TEST_FINISHER_PASS 0x5555 #define VIRT_CLINT_ADDR 0x2000000 @@ -122,7 +126,11 @@ static int virt_timer_init(bool cold_boot) static int virt_system_down(u32 type) { - /* For now nothing to do. */ + /* Tell the "finisher" that the simulation + * was successful so that QEMU exits + */ + writew(VIRT_TEST_FINISHER_PASS, (void *)VIRT_TEST_ADDR); + return 0; } |