diff options
| author |   David Gibson <david@gibson.dropbear.id.au> | 2007-05-08 12:59:31 +1000 |
|---|---|---|
| committer |   Paul Mackerras <paulus@samba.org> | 2007-05-08 14:47:33 +1000 |
| commit | d9b55a03611ff2e2e54fb4e1ad2648d5eb870fa3 (patch) | |
| tree | 5704be539afcd6f29b1f5751476c8b4f53673bff /arch/powerpc/platforms/44x/44x.h | |
| parent | [POWERPC] Support for the Ebony 440GP reference board in arch/powerpc (diff) | |
| download | linux-dev-d9b55a03611ff2e2e54fb4e1ad2648d5eb870fa3.tar.xz linux-dev-d9b55a03611ff2e2e54fb4e1ad2648d5eb870fa3.zip | |
[POWERPC] Early serial debug support for PPC44x
This adds support for early serial debugging via the built in
port on IBM/AMCC PowerPC 44x CPUs. It uses a bolted TLB entry in
address space 1 for the UART's mapping, allowing robust debugging both
before and after the initialization of the MMU.
Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/platforms/44x/44x.h')
| -rw-r--r-- | arch/powerpc/platforms/44x/44x.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/44x/44x.h b/arch/powerpc/platforms/44x/44x.h index 45f24b166f4d..42eabf87fea3 100644 --- a/arch/powerpc/platforms/44x/44x.h +++ b/arch/powerpc/platforms/44x/44x.h @@ -1,6 +1,8 @@ #ifndef __POWERPC_PLATFORMS_44X_44X_H #define __POWERPC_PLATFORMS_44X_44X_H +extern u8 as1_readb(volatile u8 __iomem *addr); +extern void as1_writeb(u8 data, volatile u8 __iomem *addr); extern void ppc44x_reset_system(char *cmd); #endif /* __POWERPC_PLATFORMS_44X_44X_H */ |