diff options
| author | Albert Herranz <albert_herranz@yahoo.es> | 2009-12-12 07:31:51 +0100 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2009-12-13 06:24:31 +0100 |
| commit | d1d56f8c1d5a622228177eca47e9dcff0498bddb (patch) | |
| tree | 450b587fbe84b0e1e6f46f8d6c3bf1b5420b6e39 /arch/powerpc/kernel/head_32.S | |
| parent | powerpc: reserve fixmap entries for early debug (diff) | |
| download | linux-d1d56f8c1d5a622228177eca47e9dcff0498bddb.tar.xz linux-d1d56f8c1d5a622228177eca47e9dcff0498bddb.zip | |
powerpc: gamecube/wii: early debugging using usbgecko
Add support for using the USB Gecko adapter as an early debugging
console on the Nintendo GameCube and Wii video game consoles.
The USB Gecko is a 3rd party memory card interface adapter that provides
a EXI (External Interface) to USB serial converter.
Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'arch/powerpc/kernel/head_32.S')
| -rw-r--r-- | arch/powerpc/kernel/head_32.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index 829c3fe7c5a2..e025e89fe93e 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -164,6 +164,9 @@ __after_mmu_off: #ifdef CONFIG_PPC_EARLY_DEBUG_CPM bl setup_cpm_bat #endif +#ifdef CONFIG_PPC_EARLY_DEBUG_USBGECKO + bl setup_usbgecko_bat +#endif /* * Call setup_cpu for CPU 0 and initialize 6xx Idle @@ -1203,6 +1206,28 @@ setup_cpm_bat: blr #endif +#ifdef CONFIG_PPC_EARLY_DEBUG_USBGECKO +setup_usbgecko_bat: + /* prepare a BAT for early io */ +#if defined(CONFIG_GAMECUBE) + lis r8, 0x0c00 +#elif defined(CONFIG_WII) + lis r8, 0x0d00 +#else +#error Invalid platform for USB Gecko based early debugging. +#endif + /* + * The virtual address used must match the virtual address + * associated to the fixmap entry FIX_EARLY_DEBUG_BASE. + */ + lis r11, 0xfffe /* top 128K */ + ori r8, r8, 0x002a /* uncached, guarded ,rw */ + ori r11, r11, 0x2 /* 128K, Vs=1, Vp=0 */ + mtspr SPRN_DBAT1L, r8 + mtspr SPRN_DBAT1U, r11 + blr +#endif + #ifdef CONFIG_8260 /* Jump into the system reset for the rom. * We first disable the MMU, and then jump to the ROM reset address. |