[ARM] 4311/1: ixp4xx: add KIXRP435 platform

Add Intel KIXRP435 Reference Platform based on IXP43x processor.
Fixed after review : access to cp15 removed in identification functions,
used access to global processor_id instead

Signed-off-by: Vladimir Barinov <vbarinov@ru.mvista.com>
Signed-off-by: Ruslan  Sushko <rsushko@ru.mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/configs/ixp4xx_defconfig

@@ -117,11 +117,13 @@ CONFIG_ARCH_ADI_COYOTE=y
 CONFIG_ARCH_IXDP425=y
 CONFIG_MACH_IXDPG425=y
 CONFIG_MACH_IXDP465=y
+CONFIG_MACH_KIXRP435=y
 CONFIG_ARCH_IXCDP1100=y
 CONFIG_ARCH_PRPMC1100=y
 CONFIG_MACH_NAS100D=y
 CONFIG_ARCH_IXDP4XX=y
 CONFIG_CPU_IXP46X=y
+CONFIG_CPU_IXP43X=y
 # CONFIG_MACH_GTWX5715 is not set
 
 #

arch/arm/mach-ixp4xx/Kconfig

@@ -62,6 +62,12 @@ config MACH_IXDP465
 	  IXDP465 Development Platform (Also known as BMP).
 	  For more information on this platform, see <file:Documentation/arm/IXP4xx>.
 
+config MACH_KIXRP435
+	bool "KIXRP435"
+	help
+	  Say 'Y' here if you want your kernel to support Intel's
+	  KIXRP435 Reference Platform.
+	  For more information on this platform, see <file:Documentation/arm/IXP4xx>.
 
 #
 # IXCDP1100 is the exact same HW as IXDP425, but with a different machine 
@@ -94,7 +100,7 @@ config MACH_NAS100D
 #
 config	ARCH_IXDP4XX
 	bool
-	depends on ARCH_IXDP425 || MACH_IXDP465
+	depends on ARCH_IXDP425 || MACH_IXDP465 || MACH_KIXRP435
 	default y
 
 #
@@ -105,6 +111,11 @@ config CPU_IXP46X
 	depends on MACH_IXDP465
 	default y
 
+config CPU_IXP43X
+	bool
+	depends on MACH_KIXRP435
+	default y
+
 config MACH_GTWX5715
 	bool "Gemtek WX5715 (Linksys WRV54G)"
 	depends on ARCH_IXP4XX

arch/arm/mach-ixp4xx/common-pci.c

@@ -374,7 +374,7 @@ void __init ixp4xx_pci_preinit(void)
 	 * Determine which PCI read method to use.
 	 * Rev 0 IXP425 requires workaround.
 	 */
-	if (!(processor_id & 0xf) && !cpu_is_ixp46x()) {
+	if (!(processor_id & 0xf) && cpu_is_ixp42x()) {
 		printk("PCI: IXP42x A0 silicon detected - "
 			"PCI Non-Prefetch Workaround Enabled\n");
 		ixp4xx_pci_read = ixp4xx_pci_read_errata;
@@ -480,7 +480,7 @@ int ixp4xx_setup(int nr, struct pci_sys_data *sys)
 	res[0].flags = IORESOURCE_IO;
 
 	res[1].name = "PCI Memory Space";
-	res[1].start = 0x48000000;
+	res[1].start = PCIBIOS_MIN_MEM;
 #ifndef CONFIG_IXP4XX_INDIRECT_PCI
 	res[1].end = 0x4bffffff;
 #else

arch/arm/mach-ixp4xx/common.c

@@ -192,7 +192,7 @@ static int ixp4xx_set_irq_type(unsigned int irq, unsigned int type)
 
 static void ixp4xx_irq_mask(unsigned int irq)
 {
-	if (cpu_is_ixp46x() && irq >= 32)
+	if ((cpu_is_ixp46x() || cpu_is_ixp43x()) && irq >= 32)
 		*IXP4XX_ICMR2 &= ~(1 << (irq - 32));
 	else
 		*IXP4XX_ICMR &= ~(1 << irq);
@@ -215,7 +215,7 @@ static void ixp4xx_irq_unmask(unsigned int irq)
 	if (!(ixp4xx_irq_edge & (1 << irq)))
 		ixp4xx_irq_ack(irq);
 
-	if (cpu_is_ixp46x() && irq >= 32)
+	if ((cpu_is_ixp46x() || cpu_is_ixp43x()) && irq >= 32)
 		*IXP4XX_ICMR2 |= (1 << (irq - 32));
 	else
 		*IXP4XX_ICMR |= (1 << irq);
@@ -239,7 +239,7 @@ void __init ixp4xx_init_irq(void)
 	/* Disable all interrupt */
 	*IXP4XX_ICMR = 0x0; 
 
-	if (cpu_is_ixp46x()) {
+	if (cpu_is_ixp46x() || cpu_is_ixp43x()) {
 		/* Route upper 32 sources to IRQ instead of FIQ */
 		*IXP4XX_ICLR2 = 0x00;
 

arch/arm/mach-ixp4xx/ixdp425-pci.c

@@ -66,7 +66,7 @@ struct hw_pci ixdp425_pci __initdata = {
 int __init ixdp425_pci_init(void)
 {
 	if (machine_is_ixdp425() || machine_is_ixcdp1100() ||
-			machine_is_ixdp465())
+			machine_is_ixdp465() || machine_is_kixrp435())
 		pci_common_init(&ixdp425_pci);
 	return 0;
 }

arch/arm/mach-ixp4xx/ixdp425-setup.c

@@ -115,6 +115,11 @@ static void __init ixdp425_init(void)
 	ixdp425_flash_resource.end =
 		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
 
+	if (cpu_is_ixp43x()) {
+		ixdp425_uart.num_resources = 1;
+		ixdp425_uart_data[1].flags = 0;
+	}
+
 	platform_add_devices(ixdp425_devices, ARRAY_SIZE(ixdp425_devices));
 }
 
@@ -156,3 +161,16 @@ MACHINE_START(IXCDP1100, "Intel IXCDP1100 Development Platform")
 	.init_machine	= ixdp425_init,
 MACHINE_END
 #endif
+
+#ifdef CONFIG_MACH_KIXRP435
+MACHINE_START(KIXRP435, "Intel KIXRP435 Reference Platform")
+	/* Maintainer: MontaVista Software, Inc. */
+	.phys_io	= IXP4XX_PERIPHERAL_BASE_PHYS,
+	.io_pg_offst	= ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xfffc,
+	.map_io		= ixp4xx_map_io,
+	.init_irq	= ixp4xx_init_irq,
+	.timer		= &ixp4xx_timer,
+	.boot_params	= 0x0100,
+	.init_machine	= ixdp425_init,
+MACHINE_END
+#endif

arch/arm/mm/proc-xscale.S

@@ -584,6 +584,11 @@ cpu_ixp42x_name:
 	.asciz	"XScale-IXP42x Family"
 	.size	cpu_ixp42x_name, . - cpu_ixp42x_name
 
+	.type	cpu_ixp43x_name, #object
+cpu_ixp43x_name:
+	.asciz	"XScale-IXP43x Family"
+	.size	cpu_ixp43x_name, . - cpu_ixp43x_name
+
 	.type	cpu_ixp46x_name, #object
 cpu_ixp46x_name:
 	.asciz	"XScale-IXP46x Family"
@@ -843,6 +848,29 @@ __ixp42x_proc_info:
 	.long	xscale_cache_fns
 	.size   __ixp42x_proc_info, . - __ixp42x_proc_info                
 
+	.type   __ixp43x_proc_info, #object
+__ixp43x_proc_info:
+	.long   0x69054040
+	.long   0xfffffff0
+	.long   PMD_TYPE_SECT | \
+		PMD_SECT_BUFFERABLE | \
+		PMD_SECT_CACHEABLE | \
+		PMD_SECT_AP_WRITE | \
+		PMD_SECT_AP_READ
+	.long   PMD_TYPE_SECT | \
+		PMD_SECT_AP_WRITE | \
+		PMD_SECT_AP_READ
+	b       __xscale_setup
+	.long   cpu_arch_name
+	.long   cpu_elf_name
+	.long   HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP
+	.long   cpu_ixp43x_name
+	.long   xscale_processor_functions
+	.long   v4wbi_tlb_fns
+	.long   xscale_mc_user_fns
+	.long   xscale_cache_fns
+	.size   __ixp43x_proc_info, . - __ixp43x_proc_info
+
 	.type	__ixp46x_proc_info, #object
 __ixp46x_proc_info:
 	.long   0x69054200

include/asm-arm/arch-ixp4xx/entry-macro.S

@@ -31,9 +31,9 @@
 
 1001:
 		/*
-		 * IXP465 has an upper IRQ status register
+		 * IXP465/IXP435 has an upper IRQ status register
 		 */
-#if defined(CONFIG_CPU_IXP46X)
+#if defined(CONFIG_CPU_IXP46X) || defined(CONFIG_CPU_IXP43X)
 		ldr	\irqstat, =(IXP4XX_INTC_BASE_VIRT+IXP4XX_ICIP2_OFFSET)
 		ldr	\irqstat, [\irqstat]		@ get upper interrupts
 		mov	\irqnr, #63

include/asm-arm/arch-ixp4xx/hardware.h

@@ -17,8 +17,8 @@
 #ifndef __ASM_ARCH_HARDWARE_H__
 #define __ASM_ARCH_HARDWARE_H__
 
-#define PCIBIOS_MIN_IO			0x00001000
-#define PCIBIOS_MIN_MEM			0x48000000
+#define PCIBIOS_MIN_IO		0x00001000
+#define PCIBIOS_MIN_MEM		(cpu_is_ixp43x() ? 0x40000000 : 0x48000000)
 
 /*
  * We override the standard dma-mask routines for bouncing.

include/asm-arm/arch-ixp4xx/io.h

@@ -61,7 +61,7 @@ extern int ixp4xx_pci_write(u32 addr, u32 cmd, u32 data);
 static inline void __iomem *
 __ixp4xx_ioremap(unsigned long addr, size_t size, unsigned long flags)
 {
-	if((addr < 0x48000000) || (addr > 0x4fffffff))
+	if((addr < PCIBIOS_MIN_MEM) || (addr > 0x4fffffff))
 		return __ioremap(addr, size, flags);
 
 	return (void *)addr;

include/asm-arm/arch-ixp4xx/irqs.h

@@ -62,10 +62,10 @@
 /*
  * Only first 32 sources are valid if running on IXP42x systems
  */
-#ifndef	CONFIG_CPU_IXP46X
-#define NR_IRQS			32
-#else
+#if defined(CONFIG_CPU_IXP46X) || defined(CONFIG_CPU_IXP43X)
 #define NR_IRQS			64
+#else
+#define NR_IRQS			32
 #endif
 
 #define	XSCALE_PMU_IRQ		(IRQ_IXP4XX_XSCALE_PMU)

include/asm-arm/arch-ixp4xx/ixp4xx-regs.h

@@ -607,15 +607,43 @@
 
 #define DCMD_LENGTH	0x01fff		/* length mask (max = 8K - 1) */
 
+/* Processor id value in CP15 Register 0 */
+#define IXP425_PROCESSOR_ID_VALUE	0x690541c0
+#define IXP435_PROCESSOR_ID_VALUE	0x69054040
+#define IXP465_PROCESSOR_ID_VALUE	0x69054200
+#define IXP4XX_PROCESSOR_ID_MASK	0xfffffff0
+
 #ifndef __ASSEMBLY__
+static inline int cpu_is_ixp42x(void)
+{
+	extern unsigned int processor_id;
+
+	if ((processor_id & IXP4XX_PROCESSOR_ID_MASK) ==
+	     IXP425_PROCESSOR_ID_VALUE )
+		return 1;
+
+	return 0;
+}
+
+static inline int cpu_is_ixp43x(void)
+{
+#ifdef CONFIG_CPU_IXP43X
+	extern unsigned int processor_id;
+
+	if ((processor_id & IXP4XX_PROCESSOR_ID_MASK) ==
+	     IXP435_PROCESSOR_ID_VALUE )
+		return 1;
+#endif
+	return 0;
+}
+
 static inline int cpu_is_ixp46x(void)
 {
 #ifdef CONFIG_CPU_IXP46X
-	unsigned int processor_id;
-
-	asm("mrc p15, 0, %0, cr0, cr0, 0;" : "=r"(processor_id) :);
+	extern unsigned int processor_id;
 
-	if ((processor_id & 0xffffff00) == 0x69054200)
+	if ((processor_id & IXP4XX_PROCESSOR_ID_MASK) ==
+	     IXP465_PROCESSOR_ID_VALUE )
 		return 1;
 #endif
 	return 0;