MIPS: XLR, XLS: Add PCI support.

Adds pci/pci-xlr.c to support for XLR PCI/PCI-X interface and XLS PCIe
interface.
Update irq.c to ack PCI interrupts, use irq handler data to do the
PCI/PCIe bus ack.

Signed-off-by: Jayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2337/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/mips/include/asm/netlogic/xlr/xlr.h b/arch/mips/include/asm/netlogic/xlr/xlr.h
index 454c236d6854..3e6372692a04 100644
--- a/arch/mips/include/asm/netlogic/xlr/xlr.h
+++ b/arch/mips/include/asm/netlogic/xlr/xlr.h
@@ -41,6 +41,7 @@ unsigned int nlm_xlr_uart_in(struct uart_port *, int);
 void nlm_xlr_uart_out(struct uart_port *, int, int);
 
 /* SMP support functions */
+struct irq_desc;
 void nlm_smp_function_ipi_handler(unsigned int irq, struct irq_desc *desc);
 void nlm_smp_resched_ipi_handler(unsigned int irq, struct irq_desc *desc);
 int nlm_wakeup_secondary_cpus(u32 wakeup_mask);
@@ -51,4 +52,24 @@ void prom_pre_boot_secondary_cpus(void);
 extern struct plat_smp_ops nlm_smp_ops;
 extern unsigned long nlm_common_ebase;
 
+/* XLS B silicon "Rook" */
+static inline unsigned int nlm_chip_is_xls_b(void)
+{
+        uint32_t prid = read_c0_prid();
+
+        return ((prid & 0xf000) == 0x4000);
+}
+
+/*
+ *  XLR chip types
+ */
+ /* The XLS product line has chip versions 0x[48c]? */
+static inline unsigned int nlm_chip_is_xls(void)
+{
+        uint32_t prid = read_c0_prid();
+
+        return ((prid & 0xf000) == 0x8000 || (prid & 0xf000) == 0x4000 ||
+                (prid & 0xf000) == 0xc000);
+}
+
 #endif /* _ASM_NLM_XLR_H */