diff --git a/include/asm-mips/txx9/generic.h b/include/asm-mips/txx9/generic.h
index 2ff6c20..6cd1477 100644
--- a/include/asm-mips/txx9/generic.h
+++ b/include/asm-mips/txx9/generic.h
@@ -20,4 +20,22 @@
 extern unsigned int txx9_cpu_clock;
 extern unsigned int txx9_gbus_clock;
 
+struct pci_dev;
+struct txx9_board_vec {
+	unsigned long type;
+	const char *system;
+	void (*prom_init)(void);
+	void (*mem_setup)(void);
+	void (*irq_setup)(void);
+	void (*time_init)(void);
+	void (*arch_init)(void);
+	void (*device_init)(void);
+#ifdef CONFIG_PCI
+	int (*pci_map_irq)(const struct pci_dev *dev, u8 slot, u8 pin);
+#endif
+};
+extern struct txx9_board_vec *txx9_board_vec;
+extern int (*txx9_irq_dispatch)(int pending);
+void prom_init_cmdline(void);
+
 #endif /* __ASM_TXX9_GENERIC_H */
diff --git a/include/asm-mips/txx9/jmr3927.h b/include/asm-mips/txx9/jmr3927.h
index 29e5498..d6eb1b6 100644
--- a/include/asm-mips/txx9/jmr3927.h
+++ b/include/asm-mips/txx9/jmr3927.h
@@ -174,4 +174,9 @@
  *	INT[3:0]
  */
 
+void jmr3927_prom_init(void);
+void jmr3927_irq_setup(void);
+struct pci_dev;
+int jmr3927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
+
 #endif /* __ASM_TXX9_JMR3927_H */
diff --git a/include/asm-mips/txx9/rbtx4927.h b/include/asm-mips/txx9/rbtx4927.h
index 5b6f488..bf19458 100644
--- a/include/asm-mips/txx9/rbtx4927.h
+++ b/include/asm-mips/txx9/rbtx4927.h
@@ -46,12 +46,16 @@
 #define RBTX4927_INTF_PCIB	(1 << RBTX4927_INTB_PCIB)
 #define RBTX4927_INTF_PCIA	(1 << RBTX4927_INTB_PCIA)
 
-#define RBTX4927_IRQ_IOC	(TX4927_IRQ_PIC_BEG + TX4927_NUM_IR)
+#define RBTX4927_NR_IRQ_IOC	8	/* IOC */
+
+#define RBTX4927_IRQ_IOC	(TXX9_IRQ_BASE + TX4927_NUM_IR)
 #define RBTX4927_IRQ_IOC_PCID	(RBTX4927_IRQ_IOC + RBTX4927_INTB_PCID)
 #define RBTX4927_IRQ_IOC_PCIC	(RBTX4927_IRQ_IOC + RBTX4927_INTB_PCIC)
 #define RBTX4927_IRQ_IOC_PCIB	(RBTX4927_IRQ_IOC + RBTX4927_INTB_PCIB)
 #define RBTX4927_IRQ_IOC_PCIA	(RBTX4927_IRQ_IOC + RBTX4927_INTB_PCIA)
 
+#define RBTX4927_IRQ_IOCINT	(TXX9_IRQ_BASE + TX4927_IR_INT(1))
+
 #ifdef CONFIG_PCI
 #define RBTX4927_ISA_IO_OFFSET RBTX4927_PCIIO
 #else
@@ -65,8 +69,11 @@
 #define RBTX4927_SW_RESET_ENABLE_SET            0x01
 
 #define RBTX4927_RTL_8019_BASE (0x1c020280 - RBTX4927_ISA_IO_OFFSET)
-#define RBTX4927_RTL_8019_IRQ  (TX4927_IRQ_PIC_BEG + 5)
+#define RBTX4927_RTL_8019_IRQ  (TXX9_IRQ_BASE + TX4927_IR_INT(3))
 
-int toshiba_rbtx4927_irq_nested(int sw_irq);
+void rbtx4927_prom_init(void);
+void rbtx4927_irq_setup(void);
+struct pci_dev;
+int rbtx4927_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
 
 #endif /* __ASM_TXX9_RBTX4927_H */
diff --git a/include/asm-mips/txx9/rbtx4938.h b/include/asm-mips/txx9/rbtx4938.h
index 8450f73..2f5d5e7 100644
--- a/include/asm-mips/txx9/rbtx4938.h
+++ b/include/asm-mips/txx9/rbtx4938.h
@@ -101,35 +101,12 @@
  * that particular IRQ on an RBTX4938 machine.  Add new 'spaces' as new
  * IRQ hardware is supported.
  */
-#define RBTX4938_NR_IRQ_LOCAL	8
-#define RBTX4938_NR_IRQ_IRC	32	/* On-Chip IRC */
 #define RBTX4938_NR_IRQ_IOC	8
 
-#define TX4938_IRQ_CP0_BEG  MIPS_CPU_IRQ_BASE
-#define TX4938_IRQ_CP0_END  (MIPS_CPU_IRQ_BASE + 8 - 1)
-
-#define TX4938_IRQ_PIC_BEG  TXX9_IRQ_BASE
-#define TX4938_IRQ_PIC_END  (TXX9_IRQ_BASE + TXx9_MAX_IR - 1)
-#define TX4938_IRQ_NEST_EXT_ON_PIC  (TX4938_IRQ_PIC_BEG+2)
-#define TX4938_IRQ_NEST_PIC_ON_CP0  (TX4938_IRQ_CP0_BEG+2)
-#define TX4938_IRQ_USER0            (TX4938_IRQ_CP0_BEG+0)
-#define TX4938_IRQ_USER1            (TX4938_IRQ_CP0_BEG+1)
-#define TX4938_IRQ_CPU_TIMER        (TX4938_IRQ_CP0_BEG+7)
-
-#define TOSHIBA_RBTX4938_IRQ_IOC_RAW_BEG   0
-#define TOSHIBA_RBTX4938_IRQ_IOC_RAW_END   7
-
-#define TOSHIBA_RBTX4938_IRQ_IOC_BEG  ((TX4938_IRQ_PIC_END+1)+TOSHIBA_RBTX4938_IRQ_IOC_RAW_BEG) /* 56 */
-#define TOSHIBA_RBTX4938_IRQ_IOC_END  ((TX4938_IRQ_PIC_END+1)+TOSHIBA_RBTX4938_IRQ_IOC_RAW_END) /* 63 */
-#define RBTX4938_IRQ_LOCAL	TX4938_IRQ_CP0_BEG
-#define RBTX4938_IRQ_IRC	(RBTX4938_IRQ_LOCAL + RBTX4938_NR_IRQ_LOCAL)
-#define RBTX4938_IRQ_IOC	(RBTX4938_IRQ_IRC + RBTX4938_NR_IRQ_IRC)
+#define RBTX4938_IRQ_IRC	TXX9_IRQ_BASE
+#define RBTX4938_IRQ_IOC	(TXX9_IRQ_BASE + TX4938_NUM_IR)
 #define RBTX4938_IRQ_END	(RBTX4938_IRQ_IOC + RBTX4938_NR_IRQ_IOC)
 
-#define RBTX4938_IRQ_LOCAL_SOFT0	(RBTX4938_IRQ_LOCAL + RBTX4938_SOFT_INT0)
-#define RBTX4938_IRQ_LOCAL_SOFT1	(RBTX4938_IRQ_LOCAL + RBTX4938_SOFT_INT1)
-#define RBTX4938_IRQ_LOCAL_IRC	(RBTX4938_IRQ_LOCAL + RBTX4938_IRC_INT)
-#define RBTX4938_IRQ_LOCAL_TIMER	(RBTX4938_IRQ_LOCAL + RBTX4938_TIMER_INT)
 #define RBTX4938_IRQ_IRC_ECCERR	(RBTX4938_IRQ_IRC + TX4938_IR_ECCERR)
 #define RBTX4938_IRQ_IRC_WTOERR	(RBTX4938_IRQ_IRC + TX4938_IR_WTOERR)
 #define RBTX4938_IRQ_IRC_INT(n)	(RBTX4938_IRQ_IRC + TX4938_IR_INT(n))
@@ -157,11 +134,16 @@
 
 
 /* IOC (PCI, etc) */
-#define RBTX4938_IRQ_IOCINT	(TX4938_IRQ_NEST_EXT_ON_PIC)
+#define RBTX4938_IRQ_IOCINT	(TXX9_IRQ_BASE + TX4938_IR_INT(0))
 /* Onboard 10M Ether */
-#define RBTX4938_IRQ_ETHER	(TX4938_IRQ_NEST_EXT_ON_PIC + 1)
+#define RBTX4938_IRQ_ETHER	(TXX9_IRQ_BASE + TX4938_IR_INT(1))
 
 #define RBTX4938_RTL_8019_BASE (RBTX4938_ETHER_ADDR - mips_io_port_base)
 #define RBTX4938_RTL_8019_IRQ  (RBTX4938_IRQ_ETHER)
 
+void rbtx4938_prom_init(void);
+void rbtx4938_irq_setup(void);
+struct pci_dev;
+int rbtx4938_pci_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
+
 #endif /* __ASM_TXX9_RBTX4938_H */
diff --git a/include/asm-mips/txx9/tx4927.h b/include/asm-mips/txx9/tx4927.h
index c0382fd..46d60af 100644
--- a/include/asm-mips/txx9/tx4927.h
+++ b/include/asm-mips/txx9/tx4927.h
@@ -32,20 +32,6 @@
 #include <asm/txx9irq.h>
 #include <asm/txx9/tx4927pcic.h>
 
-#define TX4927_IRQ_CP0_BEG  MIPS_CPU_IRQ_BASE
-#define TX4927_IRQ_CP0_END  (MIPS_CPU_IRQ_BASE + 8 - 1)
-
-#define TX4927_IRQ_PIC_BEG  TXX9_IRQ_BASE
-#define TX4927_IRQ_PIC_END  (TXX9_IRQ_BASE + TXx9_MAX_IR - 1)
-
-
-#define TX4927_IRQ_USER0	    (TX4927_IRQ_CP0_BEG+0)
-#define TX4927_IRQ_USER1	    (TX4927_IRQ_CP0_BEG+1)
-#define TX4927_IRQ_NEST_PIC_ON_CP0  (TX4927_IRQ_CP0_BEG+2)
-#define TX4927_IRQ_CPU_TIMER	    (TX4927_IRQ_CP0_BEG+7)
-
-#define TX4927_IRQ_NEST_EXT_ON_PIC  (TX4927_IRQ_PIC_BEG+3)
-
 #define TX4927_SDRAMC_REG	0xff1f8000
 #define TX4927_EBUSC_REG	0xff1f9000
 #define TX4927_PCIC_REG		0xff1fd000
@@ -54,10 +40,14 @@
 #define TX4927_NR_TMR	3
 #define TX4927_TMR_REG(ch)	(0xff1ff000 + (ch) * 0x100)
 
+#define TX4927_IR_INT(n)	(2 + (n))
+#define TX4927_IR_SIO(n)	(8 + (n))
 #define TX4927_IR_PCIC		16
 #define TX4927_IR_PCIERR	22
 #define TX4927_NUM_IR	32
 
+#define TX4927_IRC_INT	2	/* IP[2] in Status register */
+
 struct tx4927_sdramc_reg {
 	volatile unsigned long long cr[4];
 	volatile unsigned long long unused0[4];
@@ -224,5 +214,6 @@
 
 int tx4927_report_pciclk(void);
 int tx4927_pciclk66_setup(void);
+void tx4927_irq_init(void);
 
 #endif /* __ASM_TXX9_TX4927_H */
diff --git a/include/asm-mips/txx9/tx4938.h b/include/asm-mips/txx9/tx4938.h
index 0bb8919..12de68a 100644
--- a/include/asm-mips/txx9/tx4938.h
+++ b/include/asm-mips/txx9/tx4938.h
@@ -18,11 +18,6 @@
 #define tx4938_read_nfmc(addr) (*(volatile unsigned int *)(addr))
 #define tx4938_write_nfmc(b, addr) (*(volatile unsigned int *)(addr)) = (b)
 
-#define TX4938_NR_IRQ_LOCAL     TX4938_IRQ_PIC_BEG
-
-#define TX4938_IRQ_IRC_PCIC     (TX4938_NR_IRQ_LOCAL + TX4938_IR_PCIC)
-#define TX4938_IRQ_IRC_PCIERR   (TX4938_NR_IRQ_LOCAL + TX4938_IR_PCIERR)
-
 #define TX4938_PCIIO_0 0x10000000
 #define TX4938_PCIIO_1 0x01010000
 #define TX4938_PCIMEM_0 0x08000000
@@ -271,6 +266,8 @@
 #define TX4938_IR_ETH0	TX4938_IR_INT(4)
 #define TX4938_IR_ETH1	TX4938_IR_INT(3)
 
+#define TX4938_IRC_INT	2	/* IP[2] in Status register */
+
 /*
  * CCFG
  */
@@ -463,5 +460,6 @@
 int tx4938_pciclk66_setup(void);
 struct pci_dev;
 int tx4938_pcic1_map_irq(const struct pci_dev *dev, u8 slot);
+void tx4938_irq_init(void);
 
 #endif