diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-12-07 16:30:11 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-12-07 16:30:11 -0300 |
commit | 189382f7a338c02b448ab27e1d5566e052165dc8 (patch) | |
tree | 14903209649ee76584b17afa492e31a0c9460c27 /arch/powerpc/boot/opal.c | |
parent | 62e27076b7a48d1c8fc4eed59ff75f6382915c46 (diff) |
Linux-libre 4.8.12-gnupck-4.8.12-gnu
Diffstat (limited to 'arch/powerpc/boot/opal.c')
-rw-r--r-- | arch/powerpc/boot/opal.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/boot/opal.c b/arch/powerpc/boot/opal.c index 1f37e1c1d..d7b4fd47e 100644 --- a/arch/powerpc/boot/opal.c +++ b/arch/powerpc/boot/opal.c @@ -23,14 +23,25 @@ struct opal { static u32 opal_con_id; +/* see opal-wrappers.S */ int64_t opal_console_write(int64_t term_number, u64 *length, const u8 *buffer); int64_t opal_console_read(int64_t term_number, uint64_t *length, u8 *buffer); int64_t opal_console_write_buffer_space(uint64_t term_number, uint64_t *length); int64_t opal_console_flush(uint64_t term_number); int64_t opal_poll_events(uint64_t *outstanding_event_mask); +void opal_kentry(unsigned long fdt_addr, void *vmlinux_addr); + static int opal_con_open(void) { + /* + * When OPAL loads the boot kernel it stashes the OPAL base and entry + * address in r8 and r9 so the kernel can use the OPAL console + * before unflattening the devicetree. While executing the wrapper will + * probably trash r8 and r9 so this kentry hook restores them before + * entering the decompressed kernel. + */ + platform_ops.kentry = opal_kentry; return 0; } |