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authorSteven J. Hill <sjhill@mips.com>2013-01-17 21:37:03 +0400
committerRalf Baechle <ralf@linux-mips.org>2013-02-01 13:00:21 +0400
commit9b73100911ac6886e1bbf54a4626d545f9ba6ddf (patch)
treee2c1ceef05fe279eba70153908a7df75b18d401d
parent8fba1e588b7ed124bef42548924a6f4f95de9dba (diff)
downloadlinux-9b73100911ac6886e1bbf54a4626d545f9ba6ddf.tar.xz
MIPS: SEAD3: Implement OF support.
Activate USE_OF for SEAD-3 platform. Add basic DTS file and convert memory detection and reservations to use OF. [ralf@linux-mips.org: Remove unnecessary #ifdef wrapper in generic.h. Make <asm/mips-boards/generic.h> inclusion work even without prior <linux/of_fdt.h> inclusion.] Signed-off-by: Steven J. Hill <sjhill@mips.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/4809/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/Kconfig1
-rw-r--r--arch/mips/include/asm/mips-boards/generic.h4
-rw-r--r--arch/mips/mti-sead3/Makefile10
-rw-r--r--arch/mips/mti-sead3/sead3-init.c5
-rw-r--r--arch/mips/mti-sead3/sead3-memory.c138
-rw-r--r--arch/mips/mti-sead3/sead3-setup.c27
-rw-r--r--arch/mips/mti-sead3/sead3.dts26
7 files changed, 70 insertions, 141 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 2ac626ab9d43..1110cd718ff5 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -353,6 +353,7 @@ config MIPS_SEAD3
select USB_ARCH_HAS_EHCI
select USB_EHCI_BIG_ENDIAN_DESC
select USB_EHCI_BIG_ENDIAN_MMIO
+ select USE_OF
help
This enables support for the MIPS Technologies SEAD3 evaluation
board.
diff --git a/arch/mips/include/asm/mips-boards/generic.h b/arch/mips/include/asm/mips-boards/generic.h
index 6e23ceb0ba8c..c01e286394da 100644
--- a/arch/mips/include/asm/mips-boards/generic.h
+++ b/arch/mips/include/asm/mips-boards/generic.h
@@ -87,6 +87,10 @@
extern int mips_revision_sconid;
+#ifdef CONFIG_OF
+extern struct boot_param_header __dtb_start;
+#endif
+
#ifdef CONFIG_PCI
extern void mips_pcibios_init(void);
#else
diff --git a/arch/mips/mti-sead3/Makefile b/arch/mips/mti-sead3/Makefile
index 626afeac4386..10ec701ce6c7 100644
--- a/arch/mips/mti-sead3/Makefile
+++ b/arch/mips/mti-sead3/Makefile
@@ -5,10 +5,12 @@
# Copyright (C) 2008 Wind River Systems, Inc.
# written by Ralf Baechle <ralf@linux-mips.org>
#
+# Copyright (C) 2012 MIPS Technoligies, Inc. All rights reserved.
+# Steven J. Hill <sjhill@mips.com>
+#
obj-y := sead3-lcd.o sead3-cmdline.o \
sead3-display.o sead3-init.o sead3-int.o \
- sead3-mtd.o sead3-net.o \
- sead3-memory.o sead3-platform.o \
+ sead3-mtd.o sead3-net.o sead3-platform.o \
sead3-reset.o sead3-setup.o sead3-time.o
obj-y += sead3-i2c-dev.o sead3-i2c.o \
@@ -17,3 +19,7 @@ obj-y += sead3-i2c-dev.o sead3-i2c.o \
obj-$(CONFIG_EARLY_PRINTK) += sead3-console.o
obj-$(CONFIG_USB_EHCI_HCD) += sead3-ehci.o
+obj-$(CONFIG_OF) += sead3.dtb.o
+
+$(obj)/%.dtb: $(obj)/%.dts
+ $(call if_changed,dtc)
diff --git a/arch/mips/mti-sead3/sead3-init.c b/arch/mips/mti-sead3/sead3-init.c
index a958cad6fff6..f95abaa1aa5d 100644
--- a/arch/mips/mti-sead3/sead3-init.c
+++ b/arch/mips/mti-sead3/sead3-init.c
@@ -77,7 +77,6 @@ void __init prom_init(void)
board_ejtag_handler_setup = mips_ejtag_setup;
prom_init_cmdline();
- prom_meminit();
#ifdef CONFIG_EARLY_PRINTK
if ((strstr(prom_getcmdline(), "console=ttyS0")) != NULL)
prom_init_early_console(0);
@@ -89,3 +88,7 @@ void __init prom_init(void)
strcat(prom_getcmdline(), " console=ttyS0,38400n8r");
#endif
}
+
+void prom_free_prom_memory(void)
+{
+}
diff --git a/arch/mips/mti-sead3/sead3-memory.c b/arch/mips/mti-sead3/sead3-memory.c
deleted file mode 100644
index da9244106f86..000000000000
--- a/arch/mips/mti-sead3/sead3-memory.c
+++ /dev/null
@@ -1,138 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
- */
-#include <linux/bootmem.h>
-
-#include <asm/bootinfo.h>
-#include <asm/sections.h>
-#include <asm/mips-boards/prom.h>
-
-enum yamon_memtypes {
- yamon_dontuse,
- yamon_prom,
- yamon_free,
-};
-
-static struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
-
-/* determined physical memory size, not overridden by command line args */
-unsigned long physical_memsize = 0L;
-
-struct prom_pmemblock * __init prom_getmdesc(void)
-{
- char *memsize_str, *ptr;
- unsigned int memsize;
- static char cmdline[COMMAND_LINE_SIZE] __initdata;
- long val;
- int tmp;
-
- /* otherwise look in the environment */
- memsize_str = prom_getenv("memsize");
- if (!memsize_str) {
- pr_warn("memsize not set in boot prom, set to default 32Mb\n");
- physical_memsize = 0x02000000;
- } else {
- tmp = kstrtol(memsize_str, 0, &val);
- physical_memsize = (unsigned long)val;
- }
-
-#ifdef CONFIG_CPU_BIG_ENDIAN
- /* SOC-it swaps, or perhaps doesn't swap, when DMA'ing the last
- word of physical memory */
- physical_memsize -= PAGE_SIZE;
-#endif
-
- /* Check the command line for a memsize directive that overrides
- the physical/default amount */
- strcpy(cmdline, arcs_cmdline);
- ptr = strstr(cmdline, "memsize=");
- if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
- ptr = strstr(ptr, " memsize=");
-
- if (ptr)
- memsize = memparse(ptr + 8, &ptr);
- else
- memsize = physical_memsize;
-
- memset(mdesc, 0, sizeof(mdesc));
-
- mdesc[0].type = yamon_dontuse;
- mdesc[0].base = 0x00000000;
- mdesc[0].size = 0x00001000;
-
- mdesc[1].type = yamon_prom;
- mdesc[1].base = 0x00001000;
- mdesc[1].size = 0x000ef000;
-
- /*
- * The area 0x000f0000-0x000fffff is allocated for BIOS memory by the
- * south bridge and PCI access always forwarded to the ISA Bus and
- * BIOSCS# is always generated.
- * This mean that this area can't be used as DMA memory for PCI
- * devices.
- */
- mdesc[2].type = yamon_dontuse;
- mdesc[2].base = 0x000f0000;
- mdesc[2].size = 0x00010000;
-
- mdesc[3].type = yamon_dontuse;
- mdesc[3].base = 0x00100000;
- mdesc[3].size = CPHYSADDR(PFN_ALIGN((unsigned long)&_end)) -
- mdesc[3].base;
-
- mdesc[4].type = yamon_free;
- mdesc[4].base = CPHYSADDR(PFN_ALIGN(&_end));
- mdesc[4].size = memsize - mdesc[4].base;
-
- return &mdesc[0];
-}
-
-static int __init prom_memtype_classify(unsigned int type)
-{
- switch (type) {
- case yamon_free:
- return BOOT_MEM_RAM;
- case yamon_prom:
- return BOOT_MEM_ROM_DATA;
- default:
- return BOOT_MEM_RESERVED;
- }
-}
-
-void __init prom_meminit(void)
-{
- struct prom_pmemblock *p;
-
- p = prom_getmdesc();
-
- while (p->size) {
- long type;
- unsigned long base, size;
-
- type = prom_memtype_classify(p->type);
- base = p->base;
- size = p->size;
-
- add_memory_region(base, size, type);
- p++;
- }
-}
-
-void __init prom_free_prom_memory(void)
-{
- unsigned long addr;
- int i;
-
- for (i = 0; i < boot_mem_map.nr_map; i++) {
- if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
- continue;
-
- addr = boot_mem_map.map[i].addr;
- free_init_pages("prom memory",
- addr, addr + boot_mem_map.map[i].size);
- }
-}
diff --git a/arch/mips/mti-sead3/sead3-setup.c b/arch/mips/mti-sead3/sead3-setup.c
index 8ad46ad31b49..f012fd164cee 100644
--- a/arch/mips/mti-sead3/sead3-setup.c
+++ b/arch/mips/mti-sead3/sead3-setup.c
@@ -6,6 +6,12 @@
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
*/
#include <linux/init.h>
+#include <linux/of_platform.h>
+#include <linux/of_fdt.h>
+#include <linux/bootmem.h>
+
+#include <asm/mips-boards/generic.h>
+#include <asm/prom.h>
int coherentio; /* 0 => no DMA cache coherency (may be set by user) */
int hw_coherentio; /* 0 => no HW DMA cache coherency (reflects real HW) */
@@ -17,4 +23,25 @@ const char *get_system_type(void)
void __init plat_mem_setup(void)
{
+ /*
+ * Load the builtin devicetree. This causes the chosen node to be
+ * parsed resulting in our memory appearing
+ */
+ __dt_setup_arch(&__dtb_start);
+}
+
+void __init device_tree_init(void)
+{
+ unsigned long base, size;
+
+ if (!initial_boot_params)
+ return;
+
+ base = virt_to_phys((void *)initial_boot_params);
+ size = be32_to_cpu(initial_boot_params->totalsize);
+
+ /* Before we do anything, lets reserve the dt blob */
+ reserve_bootmem(base, size, BOOTMEM_DEFAULT);
+
+ unflatten_device_tree();
}
diff --git a/arch/mips/mti-sead3/sead3.dts b/arch/mips/mti-sead3/sead3.dts
new file mode 100644
index 000000000000..658f43787056
--- /dev/null
+++ b/arch/mips/mti-sead3/sead3.dts
@@ -0,0 +1,26 @@
+/dts-v1/;
+
+/memreserve/ 0x00000000 0x00001000; // reserved
+/memreserve/ 0x00001000 0x000ef000; // ROM data
+/memreserve/ 0x000f0000 0x004cc000; // reserved
+
+/ {
+ #address-cells = <1>;
+ #size-cells = <1>;
+ compatible = "mti,sead-3";
+
+ cpus {
+ cpu@0 {
+ compatible = "mti,mips14KEc", "mti,mips14Kc";
+ };
+ };
+
+ chosen {
+ bootargs = "console=ttyS1,38400 rootdelay=10 root=/dev/sda3";
+ };
+
+ memory {
+ device_type = "memory";
+ reg = <0x0 0x08000000>;
+ };
+};