diff options
| author |   Thomas Bogendoerfer <tbogendoerfer@suse.de> | 2019-10-09 15:27:17 +0200 |
|---|---|---|
| committer |   Paul Burton <paul.burton@mips.com> | 2019-10-09 14:55:57 -0700 |
| commit | c0de00b286ed1c14064ff94ca70abdfd4e4d11e8 (patch) | |
| tree | afe10195df3371bcaf5ce2c67732aa5007c77d9a /arch/mips/Kconfig | |
| parent | MIPS: SGI-IP22: set PHYS_OFFSET to memory start (diff) | |
| download | wireguard-linux-c0de00b286ed1c14064ff94ca70abdfd4e4d11e8.tar.xz wireguard-linux-c0de00b286ed1c14064ff94ca70abdfd4e4d11e8.zip | |
MIPS: SGI-IP22/28: Use PROM for memory detection
EARLY_PRINTK uses ArcWrite (via prom_putchar) on IP22/28, which needs
to not mess up PROMs data structures. ARC PROM gives out a list of
memory chunks, which are used and which are free. This fixes the
problem of not working early printk.
By using XKPHYS spaces more than 256MB memory on Indigo2 R4k machines
is working now, too.
Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'arch/mips/Kconfig')
| -rw-r--r-- | arch/mips/Kconfig | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 27244abf560f..87bfefcbdb06 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -634,6 +634,7 @@ config RALINK config SGI_IP22 bool "SGI IP22 (Indy/Indigo2)" + select ARC_MEMORY select ARC_PROMLIB select FW_ARC select FW_ARC32 @@ -658,14 +659,7 @@ config SGI_IP22 select SWAP_IO_SPACE select SYS_HAS_CPU_R4X00 select SYS_HAS_CPU_R5000 - # - # Disable EARLY_PRINTK for now since it leads to overwritten prom - # memory during early boot on some machines. - # - # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com - # for a more details discussion - # - # select SYS_HAS_EARLY_PRINTK + select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_32BIT_KERNEL select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN @@ -703,6 +697,7 @@ config SGI_IP27 config SGI_IP28 bool "SGI IP28 (Indigo2 R10k)" + select ARC_MEMORY select ARC_PROMLIB select FW_ARC select FW_ARC64 @@ -725,14 +720,7 @@ config SGI_IP28 select SGI_HAS_ZILOG select SWAP_IO_SPACE select SYS_HAS_CPU_R10000 - # - # Disable EARLY_PRINTK for now since it leads to overwritten prom - # memory during early boot on some machines. - # - # See http://www.linux-mips.org/cgi-bin/mesg.cgi?a=linux-mips&i=20091119164009.GA15038%40deprecation.cyrius.com - # for a more details discussion - # - # select SYS_HAS_EARLY_PRINTK + select SYS_HAS_EARLY_PRINTK select SYS_SUPPORTS_64BIT_KERNEL select SYS_SUPPORTS_BIG_ENDIAN select MIPS_L1_CACHE_SHIFT_7 |