From 6f7a251a259e5bf58a9ff334bdcfa3e42b6cb7a3 Mon Sep 17 00:00:00 2001 From: Wu Zhangjin Date: Fri, 6 Nov 2009 18:45:05 +0800 Subject: 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 Cc: linux-mips@linux-mips.org Signed-off-by: Ralf Baechle --- arch/mips/loongson/common/init.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/mips/loongson/common/init.c') diff --git a/arch/mips/loongson/common/init.c b/arch/mips/loongson/common/init.c index 3b1dbc1ca24..743d3571f01 100644 --- a/arch/mips/loongson/common/init.c +++ b/arch/mips/loongson/common/init.c @@ -12,12 +12,20 @@ #include +/* 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(); -- cgit v1.2.3