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authorDavid Gibson <david@gibson.dropbear.id.au>2007-05-08 12:59:31 +1000
committerPaul Mackerras <paulus@samba.org>2007-05-08 14:47:33 +1000
commitd9b55a03611ff2e2e54fb4e1ad2648d5eb870fa3 (patch)
tree5704be539afcd6f29b1f5751476c8b4f53673bff /include/asm-powerpc
parentf6dfc80554b27da11dbb36ebae166b23ec3aa9ca (diff)
downloadop-kernel-dev-d9b55a03611ff2e2e54fb4e1ad2648d5eb870fa3.zip
op-kernel-dev-d9b55a03611ff2e2e54fb4e1ad2648d5eb870fa3.tar.gz
[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 'include/asm-powerpc')
-rw-r--r--include/asm-powerpc/mmu-44x.h6
-rw-r--r--include/asm-powerpc/udbg.h1
2 files changed, 7 insertions, 0 deletions
diff --git a/include/asm-powerpc/mmu-44x.h b/include/asm-powerpc/mmu-44x.h
index 7bbc37e..d5ce7a8 100644
--- a/include/asm-powerpc/mmu-44x.h
+++ b/include/asm-powerpc/mmu-44x.h
@@ -64,7 +64,13 @@ typedef struct {
#endif /* !__ASSEMBLY__ */
+#ifndef CONFIG_PPC_EARLY_DEBUG_44x
#define PPC44x_EARLY_TLBS 1
+#else
+#define PPC44x_EARLY_TLBS 2
+#define PPC44x_EARLY_DEBUG_VIRTADDR (ASM_CONST(0xf0000000) \
+ | (ASM_CONST(CONFIG_PPC_EARLY_DEBUG_44x_PHYSLOW) & 0xffff))
+#endif
/* Size of the TLBs used for pinning in lowmem */
#define PPC_PIN_SIZE (1 << 28) /* 256M */
diff --git a/include/asm-powerpc/udbg.h b/include/asm-powerpc/udbg.h
index d03d855..ce9d82f 100644
--- a/include/asm-powerpc/udbg.h
+++ b/include/asm-powerpc/udbg.h
@@ -47,6 +47,7 @@ extern void __init udbg_init_rtas_panel(void);
extern void __init udbg_init_rtas_console(void);
extern void __init udbg_init_debug_beat(void);
extern void __init udbg_init_btext(void);
+extern void __init udbg_init_44x_as1(void);
#endif /* __KERNEL__ */
#endif /* _ASM_POWERPC_UDBG_H */
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