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>
diff --git a/arch/mips/loongson/common/bonito-irq.c b/arch/mips/loongson/common/bonito-irq.c
index a1cbd11..2dc2a4c 100644
--- a/arch/mips/loongson/common/bonito-irq.c
+++ b/arch/mips/loongson/common/bonito-irq.c
@@ -12,6 +12,7 @@
* option) any later version.
*/
#include <linux/interrupt.h>
+#include <linux/compiler.h>
#include <loongson.h>
@@ -35,7 +36,7 @@
.unmask = bonito_irq_enable,
};
-static struct irqaction dma_timeout_irqaction = {
+static struct irqaction __maybe_unused dma_timeout_irqaction = {
.handler = no_action,
.name = "dma_timeout",
};
@@ -47,5 +48,7 @@
for (i = LOONGSON_IRQ_BASE; i < LOONGSON_IRQ_BASE + 32; i++)
set_irq_chip_and_handler(i, &bonito_irq_type, handle_level_irq);
+#ifdef CONFIG_CPU_LOONGSON2E
setup_irq(LOONGSON_IRQ_BASE + 10, &dma_timeout_irqaction);
+#endif
}