diff options
| author | Wu Zhangjin <wuzhangjin@gmail.com> | 2009-11-06 18:45:05 +0800 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-12-17 01:57:10 +0000 |
| commit | 6f7a251a259e5bf58a9ff334bdcfa3e42b6cb7a3 (patch) | |
| tree | f5b65babda54c52073819629cc0f1047b5d1b413 /arch/mips/loongson/common/init.c | |
| parent | 937893cf5be53203eabc6f4db29f86b1fdeea203 (diff) | |
MIPS: Loongson: Add basic Loongson 2F support
Loongson 2F has built-in DDR2 and PCI-X controller. The PCI-X controller
has a programming interface similiar to the the FPGA northbridge used on
Loongson 2E.
The main differences between Loongson 2E and Loongson 2F include:
1. Loongson 2F has an extra address window configuration module, which
is used to map CPU address space to DDR or PCI address space, or map
the PCI-DMA address space to DDR or LIO address space.
2. Loongson 2F supports 8 levels of software configurable CPu frequency
which can be configured in the LOONGSON_CHIPCFG0 register. The coming
cpufreq and standby support are based on this feature.
Loongson.h abstracts the modules and corresponding methods are abstracted.
Add other Loongson-2F-specific source code including gcc 4.4 support, PCI
memory space, PCI IO space, DMA address.
Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com>
Cc: linux-mips@linux-mips.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/loongson/common/init.c')
| -rw-r--r-- | arch/mips/loongson/common/init.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/loongson/common/init.c b/arch/mips/loongson/common/init.c index 3b1dbc1ca242..743d3571f010 100644 --- a/arch/mips/loongson/common/init.c +++ b/arch/mips/loongson/common/init.c @@ -12,12 +12,20 @@ #include <loongson.h> +/* Loongson CPU address windows config space base address */ +unsigned long __maybe_unused _loongson_addrwincfg_base; + void __init prom_init(void) { /* init base address of io space */ set_io_port_base((unsigned long) ioremap(LOONGSON_PCIIO_BASE, LOONGSON_PCIIO_SIZE)); +#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT) + _loongson_addrwincfg_base = (unsigned long) + ioremap(LOONGSON_ADDRWINCFG_BASE, LOONGSON_ADDRWINCFG_SIZE); +#endif + prom_init_cmdline(); prom_init_env(); prom_init_memory(); |