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-rw-r--r--arch/mips/generic/Kconfig12
-rw-r--r--arch/mips/generic/Makefile13
-rw-r--r--arch/mips/generic/Platform14
-rw-r--r--arch/mips/generic/init.c176
-rw-r--r--arch/mips/generic/irq.c64
-rw-r--r--arch/mips/generic/proc.c29
-rw-r--r--arch/mips/generic/vmlinux.its.S31
7 files changed, 339 insertions, 0 deletions
diff --git a/arch/mips/generic/Kconfig b/arch/mips/generic/Kconfig
new file mode 100644
index 000000000000..baddb0646b23
--- /dev/null
+++ b/arch/mips/generic/Kconfig
@@ -0,0 +1,12 @@
+if MIPS_GENERIC
+
+config LEGACY_BOARDS
+ bool
+ help
+ Select this from your board if the board must use a legacy, non-UHI,
+ boot protocol. This will cause the kernel to scan through the list of
+ supported machines calling their detect functions in turn if the
+ kernel is booted without being provided with an FDT via the UHI
+ boot protocol.
+
+endif
diff --git a/arch/mips/generic/Makefile b/arch/mips/generic/Makefile
new file mode 100644
index 000000000000..26e64207f7ad
--- /dev/null
+++ b/arch/mips/generic/Makefile
@@ -0,0 +1,13 @@
+#
+# Copyright (C) 2016 Imagination Technologies
+# Author: Paul Burton <paul.burton@imgtec.com>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version.
+#
+
+obj-y += init.o
+obj-y += irq.o
+obj-y += proc.o
diff --git a/arch/mips/generic/Platform b/arch/mips/generic/Platform
new file mode 100644
index 000000000000..9a30d69e2281
--- /dev/null
+++ b/arch/mips/generic/Platform
@@ -0,0 +1,14 @@
+#
+# Copyright (C) 2016 Imagination Technologies
+# Author: Paul Burton <paul.burton@imgtec.com>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 2 of the License, or (at your
+# option) any later version.
+#
+
+platform-$(CONFIG_MIPS_GENERIC) += generic/
+cflags-$(CONFIG_MIPS_GENERIC) += -I$(srctree)/arch/mips/include/asm/mach-generic
+load-$(CONFIG_MIPS_GENERIC) += 0xffffffff80100000
+all-$(CONFIG_MIPS_GENERIC) := vmlinux.gz.itb
diff --git a/arch/mips/generic/init.c b/arch/mips/generic/init.c
new file mode 100644
index 000000000000..0ea73e845440
--- /dev/null
+++ b/arch/mips/generic/init.c
@@ -0,0 +1,176 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/irqchip.h>
+#include <linux/of_fdt.h>
+#include <linux/of_platform.h>
+
+#include <asm/fw/fw.h>
+#include <asm/irq_cpu.h>
+#include <asm/machine.h>
+#include <asm/mips-cpc.h>
+#include <asm/prom.h>
+#include <asm/smp-ops.h>
+#include <asm/time.h>
+
+static __initdata const void *fdt;
+static __initdata const struct mips_machine *mach;
+static __initdata const void *mach_match_data;
+
+void __init prom_init(void)
+{
+ const struct mips_machine *check_mach;
+ const struct of_device_id *match;
+
+ if ((fw_arg0 == -2) && !fdt_check_header((void *)fw_arg1)) {
+ /*
+ * We booted using the UHI boot protocol, so we have been
+ * provided with the appropriate device tree for the board.
+ * Make use of it & search for any machine struct based upon
+ * the root compatible string.
+ */
+ fdt = (void *)fw_arg1;
+
+ for_each_mips_machine(check_mach) {
+ match = mips_machine_is_compatible(check_mach, fdt);
+ if (match) {
+ mach = check_mach;
+ mach_match_data = match->data;
+ break;
+ }
+ }
+ } else if (IS_ENABLED(CONFIG_LEGACY_BOARDS)) {
+ /*
+ * We weren't booted using the UHI boot protocol, but do
+ * support some number of boards with legacy boot protocols.
+ * Attempt to find the right one.
+ */
+ for_each_mips_machine(check_mach) {
+ if (!check_mach->detect)
+ continue;
+
+ if (!check_mach->detect())
+ continue;
+
+ mach = check_mach;
+ }
+
+ /*
+ * If we don't recognise the machine then we can't continue, so
+ * die here.
+ */
+ BUG_ON(!mach);
+
+ /* Retrieve the machine's FDT */
+ fdt = mach->fdt;
+ }
+
+ BUG_ON(!fdt);
+}
+
+void __init *plat_get_fdt(void)
+{
+ return (void *)fdt;
+}
+
+void __init plat_mem_setup(void)
+{
+ if (mach && mach->fixup_fdt)
+ fdt = mach->fixup_fdt(fdt, mach_match_data);
+
+ strlcpy(arcs_cmdline, boot_command_line, COMMAND_LINE_SIZE);
+ __dt_setup_arch((void *)fdt);
+}
+
+void __init device_tree_init(void)
+{
+ int err;
+
+ unflatten_and_copy_device_tree();
+ mips_cpc_probe();
+
+ err = register_cps_smp_ops();
+ if (err)
+ err = register_up_smp_ops();
+}
+
+void __init plat_time_init(void)
+{
+ struct device_node *np;
+ struct clk *clk;
+
+ of_clk_init(NULL);
+
+ if (!cpu_has_counter) {
+ mips_hpt_frequency = 0;
+ } else if (mach && mach->measure_hpt_freq) {
+ mips_hpt_frequency = mach->measure_hpt_freq();
+ } else {
+ 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);
+ clk_put(clk);
+
+ switch (boot_cpu_type()) {
+ case CPU_20KC:
+ case CPU_25KF:
+ /* The counter runs at the CPU clock rate */
+ break;
+ default:
+ /* The counter runs at half the CPU clock rate */
+ mips_hpt_frequency /= 2;
+ break;
+ }
+ }
+
+ clocksource_probe();
+}
+
+void __init arch_init_irq(void)
+{
+ struct device_node *intc_node;
+
+ intc_node = of_find_compatible_node(NULL, NULL,
+ "mti,cpu-interrupt-controller");
+ if (!cpu_has_veic && !intc_node)
+ mips_cpu_irq_init();
+
+ irqchip_init();
+}
+
+static int __init publish_devices(void)
+{
+ if (!of_have_populated_dt())
+ panic("Device-tree not present");
+
+ if (of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL))
+ panic("Failed to populate DT");
+
+ return 0;
+}
+arch_initcall(publish_devices);
+
+void __init prom_free_prom_memory(void)
+{
+}
diff --git a/arch/mips/generic/irq.c b/arch/mips/generic/irq.c
new file mode 100644
index 000000000000..14064bdd91dd
--- /dev/null
+++ b/arch/mips/generic/irq.c
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/irqchip/mips-gic.h>
+#include <linux/types.h>
+
+#include <asm/irq.h>
+
+int get_c0_fdc_int(void)
+{
+ int mips_cpu_fdc_irq;
+
+ if (cpu_has_veic)
+ panic("Unimplemented!");
+ else if (gic_present)
+ mips_cpu_fdc_irq = gic_get_c0_fdc_int();
+ else if (cp0_fdc_irq >= 0)
+ mips_cpu_fdc_irq = MIPS_CPU_IRQ_BASE + cp0_fdc_irq;
+ else
+ mips_cpu_fdc_irq = -1;
+
+ return mips_cpu_fdc_irq;
+}
+
+int get_c0_perfcount_int(void)
+{
+ int mips_cpu_perf_irq;
+
+ if (cpu_has_veic)
+ panic("Unimplemented!");
+ else if (gic_present)
+ mips_cpu_perf_irq = gic_get_c0_perfcount_int();
+ else if (cp0_perfcount_irq >= 0)
+ mips_cpu_perf_irq = MIPS_CPU_IRQ_BASE + cp0_perfcount_irq;
+ else
+ mips_cpu_perf_irq = -1;
+
+ return mips_cpu_perf_irq;
+}
+
+unsigned int get_c0_compare_int(void)
+{
+ int mips_cpu_timer_irq;
+
+ if (cpu_has_veic)
+ panic("Unimplemented!");
+ else if (gic_present)
+ mips_cpu_timer_irq = gic_get_c0_compare_int();
+ else
+ mips_cpu_timer_irq = MIPS_CPU_IRQ_BASE + cp0_compare_irq;
+
+ return mips_cpu_timer_irq;
+}
diff --git a/arch/mips/generic/proc.c b/arch/mips/generic/proc.c
new file mode 100644
index 000000000000..42b33250a4a2
--- /dev/null
+++ b/arch/mips/generic/proc.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ * Author: Paul Burton <paul.burton@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/of.h>
+
+#include <asm/bootinfo.h>
+
+const char *get_system_type(void)
+{
+ const char *str;
+ int err;
+
+ err = of_property_read_string(of_root, "model", &str);
+ if (!err)
+ return str;
+
+ err = of_property_read_string_index(of_root, "compatible", 0, &str);
+ if (!err)
+ return str;
+
+ return "Unknown";
+}
diff --git a/arch/mips/generic/vmlinux.its.S b/arch/mips/generic/vmlinux.its.S
new file mode 100644
index 000000000000..f67fbf1c8541
--- /dev/null
+++ b/arch/mips/generic/vmlinux.its.S
@@ -0,0 +1,31 @@
+/dts-v1/;
+
+/ {
+ description = KERNEL_NAME;
+ #address-cells = <ADDR_CELLS>;
+
+ images {
+ kernel@0 {
+ description = KERNEL_NAME;
+ data = /incbin/(VMLINUX_BINARY);
+ type = "kernel";
+ arch = "mips";
+ os = "linux";
+ compression = VMLINUX_COMPRESSION;
+ load = /bits/ ADDR_BITS <VMLINUX_LOAD_ADDRESS>;
+ entry = /bits/ ADDR_BITS <VMLINUX_ENTRY_ADDRESS>;
+ hash@0 {
+ algo = "sha1";
+ };
+ };
+ };
+
+ configurations {
+ default = "conf@default";
+
+ conf@default {
+ description = "Generic Linux kernel";
+ kernel = "kernel@0";
+ };
+ };
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 12:58:53 +0100