MIPS: add initial infrastructure for Broadcom MIPS SoCs
CFE checks CPU Thread in a different way (using register $22):
mfc0 t1, C0_BCM_CONFIG, 3 # $22
li t2, CP0_CMT_TPID # (1 << 31)
and t1, t2
bnez t1, 2f # if we are running on thread 1, skip init
nop
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index d97930e..c97ea41 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -75,6 +75,15 @@
select OF_CONTROL
select DM
+config ARCH_BMIPS
+ bool "Support BMIPS SoCs"
+ select OF_CONTROL
+ select DM
+ select CLK
+ select CPU
+ select RAM
+ select SYSRESET
+
config MACH_PIC32
bool "Support Microchip PIC32"
select OF_CONTROL
@@ -123,6 +132,7 @@
source "board/pb1x00/Kconfig"
source "board/qemu-mips/Kconfig"
source "arch/mips/mach-ath79/Kconfig"
+source "arch/mips/mach-bmips/Kconfig"
source "arch/mips/mach-pic32/Kconfig"
if MIPS
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index efe7e44..c30d4ef 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -15,6 +15,7 @@
machine-$(CONFIG_SOC_AU1X00) += au1x00
machine-$(CONFIG_ARCH_ATH79) += ath79
+machine-$(CONFIG_ARCH_BMIPS) += bmips
machine-$(CONFIG_MACH_PIC32) += pic32
machdirs := $(patsubst %,arch/mips/mach-%/,$(machine-y))
diff --git a/arch/mips/cpu/start.S b/arch/mips/cpu/start.S
index a6b7a04..d01ee9f 100644
--- a/arch/mips/cpu/start.S
+++ b/arch/mips/cpu/start.S
@@ -151,8 +151,13 @@
mfc0 t0, CP0_GLOBALNUMBER
#endif
+#ifdef CONFIG_ARCH_BMIPS
+1: mfc0 t0, CP0_DIAGNOSTIC, 3
+ and t0, t0, (1 << 31)
+#else
1: mfc0 t0, CP0_EBASE
and t0, t0, EBASE_CPUNUM
+#endif
/* Hang if this isn't the first CPU in the system */
2: beqz t0, 4f
diff --git a/arch/mips/mach-bmips/Kconfig b/arch/mips/mach-bmips/Kconfig
new file mode 100644
index 0000000..4f4d351
--- /dev/null
+++ b/arch/mips/mach-bmips/Kconfig
@@ -0,0 +1,23 @@
+menu "Broadcom MIPS platforms"
+ depends on ARCH_BMIPS
+
+config SYS_SOC
+ default "none"
+
+choice
+ prompt "Boot mode"
+
+config BMIPS_BOOT_RAM
+ bool "RAM boot"
+ depends on BMIPS_SUPPORTS_BOOT_RAM
+ help
+ This builds an image that is linked to a RAM address. It can be used
+ for booting from CFE via TFTP using an ELF image, but it can also be
+ booted from RAM by other bootloaders using a BIN image.
+
+endchoice
+
+config BMIPS_SUPPORTS_BOOT_RAM
+ bool
+
+endmenu
diff --git a/arch/mips/mach-bmips/Makefile b/arch/mips/mach-bmips/Makefile
new file mode 100644
index 0000000..f432acc
--- /dev/null
+++ b/arch/mips/mach-bmips/Makefile
@@ -0,0 +1,5 @@
+#
+# SPDX-License-Identifier: GPL-2.0+
+#
+
+obj-y += dram.o
diff --git a/arch/mips/mach-bmips/dram.c b/arch/mips/mach-bmips/dram.c
new file mode 100644
index 0000000..b19b28a
--- /dev/null
+++ b/arch/mips/mach-bmips/dram.c
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2016 Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
+ * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <ram.h>
+#include <dm.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int dram_init(void)
+{
+ struct ram_info ram;
+ struct udevice *dev;
+ int err;
+
+ err = uclass_get_device(UCLASS_RAM, 0, &dev);
+ if (err) {
+ debug("DRAM init failed: %d\n", err);
+ return 0;
+ }
+
+ err = ram_get_info(dev, &ram);
+ if (err) {
+ debug("Cannot get DRAM size: %d\n", err);
+ return 0;
+ }
+
+ debug("SDRAM base=%zx, size=%x\n", ram.base, ram.size);
+
+ gd->ram_size = ram.size;
+
+ return 0;
+}