6 files changed, 234 insertions, 0 deletions
diff --git a/arch/mips/pistachio/Kconfig b/arch/mips/pistachio/Kconfig
new file mode 100644
index 000000000..9a0e06c95
--- /dev/null
+++ b/arch/mips/pistachio/Kconfig
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0
+config PISTACHIO_GPTIMER_CLKSRC
+	bool "Enable General Purpose Timer based clocksource"
+	depends on MACH_PISTACHIO
+	select CLKSRC_PISTACHIO
+	select MIPS_EXTERNAL_TIMER
+	help
+	  This option enables a clocksource driver based on a Pistachio
+	  SoC General Purpose external timer.
+
+	  If you want to enable the CPUFreq, you need to enable
+	  this option.
+
+	  If you don't want to enable CPUFreq, you can leave this disabled.
diff --git a/arch/mips/pistachio/Makefile b/arch/mips/pistachio/Makefile
new file mode 100644
index 000000000..66f4af17f
--- /dev/null
+++ b/arch/mips/pistachio/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+obj-y	+= init.o irq.o time.o
diff --git a/arch/mips/pistachio/Platform b/arch/mips/pistachio/Platform
new file mode 100644
index 000000000..f73a1a929
--- /dev/null
+++ b/arch/mips/pistachio/Platform
@@ -0,0 +1,8 @@
+#
+# IMG Pistachio SoC
+#
+cflags-$(CONFIG_MACH_PISTACHIO)		+=				\
+		-I$(srctree)/arch/mips/include/asm/mach-pistachio
+load-$(CONFIG_MACH_PISTACHIO)		+= 0xffffffff80400000
+zload-$(CONFIG_MACH_PISTACHIO)		+= 0xffffffff81000000
+all-$(CONFIG_MACH_PISTACHIO)		:= uImage.gz
diff --git a/arch/mips/pistachio/init.c b/arch/mips/pistachio/init.c
new file mode 100644
index 000000000..558995ed6
--- /dev/null
+++ b/arch/mips/pistachio/init.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Pistachio platform setup
+ *
+ * Copyright (C) 2014 Google, Inc.
+ * Copyright (C) 2016 Imagination Technologies
+ */
+
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/of_address.h>
+#include <linux/of_fdt.h>
+
+#include <asm/cacheflush.h>
+#include <asm/dma-coherence.h>
+#include <asm/fw/fw.h>
+#include <asm/mips-boards/generic.h>
+#include <asm/mips-cps.h>
+#include <asm/prom.h>
+#include <asm/smp-ops.h>
+#include <asm/traps.h>
+
+/*
+ * Core revision register decoding
+ * Bits 23 to 20: Major rev
+ * Bits 15 to 8: Minor rev
+ * Bits 7 to 0: Maintenance rev
+ */
+#define PISTACHIO_CORE_REV_REG	0xB81483D0
+#define PISTACHIO_CORE_REV_A1	0x00100006
+#define PISTACHIO_CORE_REV_B0	0x00100106
+
+const char *get_system_type(void)
+{
+	u32 core_rev;
+	const char *sys_type;
+
+	core_rev = __raw_readl((const void *)PISTACHIO_CORE_REV_REG);
+
+	switch (core_rev) {
+	case PISTACHIO_CORE_REV_B0:
+		sys_type = "IMG Pistachio SoC (B0)";
+		break;
+
+	case PISTACHIO_CORE_REV_A1:
+		sys_type = "IMG Pistachio SoC (A1)";
+		break;
+
+	default:
+		sys_type = "IMG Pistachio SoC";
+		break;
+	}
+
+	return sys_type;
+}
+
+void __init *plat_get_fdt(void)
+{
+	if (fw_arg0 != -2)
+		panic("Device-tree not present");
+	return (void *)fw_arg1;
+}
+
+void __init plat_mem_setup(void)
+{
+	__dt_setup_arch(plat_get_fdt());
+}
+
+#define DEFAULT_CPC_BASE_ADDR	0x1bde0000
+#define DEFAULT_CDMM_BASE_ADDR	0x1bdd0000
+
+phys_addr_t mips_cpc_default_phys_base(void)
+{
+	return DEFAULT_CPC_BASE_ADDR;
+}
+
+phys_addr_t mips_cdmm_phys_base(void)
+{
+	return DEFAULT_CDMM_BASE_ADDR;
+}
+
+static void __init mips_nmi_setup(void)
+{
+	void *base;
+	extern char except_vec_nmi[];
+
+	base = cpu_has_veic ?
+		(void *)(CAC_BASE + 0xa80) :
+		(void *)(CAC_BASE + 0x380);
+	memcpy(base, except_vec_nmi, 0x80);
+	flush_icache_range((unsigned long)base,
+			   (unsigned long)base + 0x80);
+}
+
+static void __init mips_ejtag_setup(void)
+{
+	void *base;
+	extern char except_vec_ejtag_debug[];
+
+	base = cpu_has_veic ?
+		(void *)(CAC_BASE + 0xa00) :
+		(void *)(CAC_BASE + 0x300);
+	memcpy(base, except_vec_ejtag_debug, 0x80);
+	flush_icache_range((unsigned long)base,
+			   (unsigned long)base + 0x80);
+}
+
+void __init prom_init(void)
+{
+	board_nmi_handler_setup = mips_nmi_setup;
+	board_ejtag_handler_setup = mips_ejtag_setup;
+
+	mips_cm_probe();
+	mips_cpc_probe();
+	register_cps_smp_ops();
+
+	pr_info("SoC Type: %s\n", get_system_type());
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+void __init device_tree_init(void)
+{
+	if (!initial_boot_params)
+		return;
+
+	unflatten_and_copy_device_tree();
+}
diff --git a/arch/mips/pistachio/irq.c b/arch/mips/pistachio/irq.c
new file mode 100644
index 000000000..437c3101a
--- /dev/null
+++ b/arch/mips/pistachio/irq.c
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Pistachio IRQ setup
+ *
+ * Copyright (C) 2014 Google, Inc.
+ */
+
+#include <linux/init.h>
+#include <linux/irqchip.h>
+#include <linux/kernel.h>
+
+#include <asm/cpu-features.h>
+#include <asm/irq_cpu.h>
+
+void __init arch_init_irq(void)
+{
+	pr_info("EIC is %s\n", cpu_has_veic ? "on" : "off");
+	pr_info("VINT is %s\n", cpu_has_vint ? "on" : "off");
+
+	if (!cpu_has_veic)
+		mips_cpu_irq_init();
+
+	irqchip_init();
+}
diff --git a/arch/mips/pistachio/time.c b/arch/mips/pistachio/time.c
new file mode 100644
index 000000000..de64751de
--- /dev/null
+++ b/arch/mips/pistachio/time.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Pistachio clocksource/timer setup
+ *
+ * Copyright (C) 2014 Google, Inc.
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_clk.h>
+
+#include <asm/mips-cps.h>
+#include <asm/time.h>
+
+unsigned int get_c0_compare_int(void)
+{
+	return gic_get_c0_compare_int();
+}
+
+int get_c0_perfcount_int(void)
+{
+	return gic_get_c0_perfcount_int();
+}
+EXPORT_SYMBOL_GPL(get_c0_perfcount_int);
+
+int get_c0_fdc_int(void)
+{
+	return gic_get_c0_fdc_int();
+}
+
+void __init plat_time_init(void)
+{
+	struct device_node *np;
+	struct clk *clk;
+
+	of_clk_init(NULL);
+	timer_probe();
+
+	np = of_get_cpu_node(0, NULL);
+	if (!np) {
+		pr_err("Failed to get CPU node\n");
+		return;
+	}
+
+	clk = of_clk_get(np, 0);
+	if (IS_ERR(clk)) {
+		pr_err("Failed to get CPU clock: %ld\n", PTR_ERR(clk));
+		return;
+	}
+
+	mips_hpt_frequency = clk_get_rate(clk) / 2;
+	clk_put(clk);
+}