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Subject[PATCH 2/6] MIPS: Loongson64: Distinguish firmware dependencies DTB/LEFI.
Date
Add DTB boot support, only support LS2K1000 processor for now,
determine whether to use the built-in DTB or the DTB from the
firmware by checking the range of CKSEG0 and XKPHYS.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Qing Zhang <zhangqing@loongson.cn>
Signed-off-by: Xingxing Su <suxingxing@loongson.cn>
---
.../include/asm/mach-loongson64/boot_param.h | 6 ++++++
arch/mips/include/asm/mach-loongson64/loongson.h | 3 ++-
arch/mips/loongson64/env.c | 13 ++++++++++++-
arch/mips/loongson64/init.c | 16 ++++++++++++++--
4 files changed, 34 insertions(+), 4 deletions(-)

diff --git a/arch/mips/include/asm/mach-loongson64/boot_param.h b/arch/mips/include/asm/mach-loongson64/boot_param.h
index 4592841b6b0c..53c29a305ff0 100644
--- a/arch/mips/include/asm/mach-loongson64/boot_param.h
+++ b/arch/mips/include/asm/mach-loongson64/boot_param.h
@@ -198,7 +198,13 @@ enum loongson_bridge_type {
VIRTUAL = 3
};

+enum loongson_fw_interface {
+ LOONGSON_LEFI = 0,
+ LOONGSON_DTB = 1,
+};
+
struct loongson_system_configuration {
+ enum loongson_fw_interface fw_interface;
u32 nr_cpus;
u32 nr_nodes;
int cores_per_node;
diff --git a/arch/mips/include/asm/mach-loongson64/loongson.h b/arch/mips/include/asm/mach-loongson64/loongson.h
index ac1c20e172a2..3f885fa26ba6 100644
--- a/arch/mips/include/asm/mach-loongson64/loongson.h
+++ b/arch/mips/include/asm/mach-loongson64/loongson.h
@@ -23,7 +23,8 @@ extern u32 memsize, highmemsize;
extern const struct plat_smp_ops loongson3_smp_ops;

/* loongson-specific command line, env and memory initialization */
-extern void __init prom_init_env(void);
+extern void __init prom_dtb_init_env(void);
+extern void __init prom_lefi_init_env(void);
extern void __init szmem(unsigned int node);
extern void *loongson_fdt_blob;

diff --git a/arch/mips/loongson64/env.c b/arch/mips/loongson64/env.c
index 51a5d050a94c..e7d3a06175e3 100644
--- a/arch/mips/loongson64/env.c
+++ b/arch/mips/loongson64/env.c
@@ -43,7 +43,18 @@ const char *get_system_type(void)
return "Generic Loongson64 System";
}

-void __init prom_init_env(void)
+
+void __init prom_dtb_init_env(void)
+{
+ if ((fw_arg2 < CKSEG0 || fw_arg2 > CKSEG1)
+ && (fw_arg2 < XKPHYS || fw_arg2 > XKSEG))
+
+ loongson_fdt_blob = __dtb_loongson64_2core_2k1000_begin;
+ else
+ loongson_fdt_blob = (void *)fw_arg2;
+}
+
+void __init prom_lefi_init_env(void)
{
struct boot_params *boot_p;
struct loongson_params *loongson_p;
diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index cfa788bca871..8bef1ebab72d 100644
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/init.c
@@ -52,6 +52,10 @@ void __init szmem(unsigned int node)
static unsigned long num_physpages;
u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;

+ /* Otherwise come from DTB */
+ if (loongson_sysconf.fw_interface != LOONGSON_LEFI)
+ return;
+
/* Parse memory information and activate */
for (i = 0; i < loongson_memmap->nr_map; i++) {
node_id = loongson_memmap->map[i].node_id;
@@ -94,12 +98,20 @@ static void __init prom_init_memory(void)
void __init prom_init(void)
{
fw_init_cmdline();
- prom_init_env();
+
+ if (fw_arg2 == 0 || (be32_to_cpup((__be32 *)fw_arg2) == OF_DT_HEADER)) {
+ loongson_sysconf.fw_interface = LOONGSON_DTB;
+ prom_dtb_init_env();
+ } else {
+ loongson_sysconf.fw_interface = LOONGSON_LEFI;
+ prom_lefi_init_env();
+ }

/* init base address of io space */
set_io_port_base(PCI_IOBASE);

- loongson_sysconf.early_config();
+ if (loongson_sysconf.early_config)
+ loongson_sysconf.early_config();

#ifdef CONFIG_NUMA
prom_init_numa_memory();
--
2.20.1
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