linux-kernel - [PATCH 3/6] MIPS: Loongson: Use firmware arguments to get board name

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Date:   Mon,  9 Mar 2020 16:23:23 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Huacai Chen <chenhc@...ote.com>,
        Jiaxun Yang <jiaxun.yang@...goat.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jens Axboe <axboe@...nel.dk>
Cc:     linux-mips@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
        Xuefeng Li <lixuefeng@...ngson.cn>
Subject: [PATCH 3/6] MIPS: Loongson: Use firmware arguments to get board name

In order to distinguish various types of bridge chip such as AMD RS780E
or Loongson 7A1000, we can use firmware arguments to get board name.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/mips/include/asm/mach-loongson64/boot_param.h | 1 +
 arch/mips/loongson64/env.c                         | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/arch/mips/include/asm/mach-loongson64/boot_param.h b/arch/mips/include/asm/mach-loongson64/boot_param.h
index 8c286be..225a563 100644
--- a/arch/mips/include/asm/mach-loongson64/boot_param.h
+++ b/arch/mips/include/asm/mach-loongson64/boot_param.h
@@ -217,5 +217,6 @@ struct loongson_system_configuration {
 
 extern struct efi_memory_map_loongson *loongson_memmap;
 extern struct loongson_system_configuration loongson_sysconf;
+extern struct board_devices *eboard;
 
 #endif
diff --git a/arch/mips/loongson64/env.c b/arch/mips/loongson64/env.c
index 0daeb7b..a244a8c 100644
--- a/arch/mips/loongson64/env.c
+++ b/arch/mips/loongson64/env.c
@@ -24,6 +24,9 @@ EXPORT_SYMBOL(cpu_clock_freq);
 struct efi_memory_map_loongson *loongson_memmap;
 struct loongson_system_configuration loongson_sysconf;
 
+struct board_devices *eboard;
+EXPORT_SYMBOL(eboard);
+
 u64 loongson_chipcfg[MAX_PACKAGES] = {0xffffffffbfc00180};
 u64 loongson_chiptemp[MAX_PACKAGES];
 u64 loongson_freqctrl[MAX_PACKAGES];
@@ -51,6 +54,8 @@ void __init prom_init_env(void)
 		((u64)loongson_p + loongson_p->system_offset);
 	ecpu = (struct efi_cpuinfo_loongson *)
 		((u64)loongson_p + loongson_p->cpu_offset);
+	eboard = (struct board_devices *)
+		((u64)loongson_p + loongson_p->boarddev_table_offset);
 	eirq_source = (struct irq_source_routing_table *)
 		((u64)loongson_p + loongson_p->irq_offset);
 	loongson_memmap = (struct efi_memory_map_loongson *)
-- 
2.1.0