linux-kernel - [PATCH 10/10] MIPS: Loongson64: env: Hook up Loongsson-2K

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Date: Fri, 14 Jun 2024 16:40:18 +0100
From: Jiaxun Yang <jiaxun.yang@...goat.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
 Qing Zhang <zhangqing@...ngson.cn>, Binbin Zhou <zhoubinbin@...ngson.cn>, 
 Huacai Chen <chenhuacai@...nel.org>
Cc: devicetree@...r.kernel.org, linux-mips@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Jiaxun Yang <jiaxun.yang@...goat.com>, 
 stable@...r.kernel.org
Subject: [PATCH 10/10] MIPS: Loongson64: env: Hook up Loongsson-2K

Somehow those enablement bits were left over when we were
adding initial Loongson-2K support.

Set up basic information and select proper builtin DTB for
Loongson-2K.

Cc: stable@...r.kernel.org
Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
 arch/mips/include/asm/mach-loongson64/boot_param.h | 2 ++
 arch/mips/loongson64/env.c                         | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/arch/mips/include/asm/mach-loongson64/boot_param.h b/arch/mips/include/asm/mach-loongson64/boot_param.h
index e007edd6b60a..9218b3ae3383 100644
--- a/arch/mips/include/asm/mach-loongson64/boot_param.h
+++ b/arch/mips/include/asm/mach-loongson64/boot_param.h
@@ -42,12 +42,14 @@ enum loongson_cpu_type {
 	Legacy_1B = 0x5,
 	Legacy_2G = 0x6,
 	Legacy_2H = 0x7,
+	Legacy_2K = 0x8,
 	Loongson_1A = 0x100,
 	Loongson_1B = 0x101,
 	Loongson_2E = 0x200,
 	Loongson_2F = 0x201,
 	Loongson_2G = 0x202,
 	Loongson_2H = 0x203,
+	Loongson_2K = 0x204,
 	Loongson_3A = 0x300,
 	Loongson_3B = 0x301
 };
diff --git a/arch/mips/loongson64/env.c b/arch/mips/loongson64/env.c
index ef3750a6ffac..09ff05269861 100644
--- a/arch/mips/loongson64/env.c
+++ b/arch/mips/loongson64/env.c
@@ -88,6 +88,12 @@ void __init prom_lefi_init_env(void)
 	cpu_clock_freq = ecpu->cpu_clock_freq;
 	loongson_sysconf.cputype = ecpu->cputype;
 	switch (ecpu->cputype) {
+	case Legacy_2K:
+	case Loongson_2K:
+		smp_group[0] = 0x900000001fe11000;
+		loongson_sysconf.cores_per_node = 2;
+		loongson_sysconf.cores_per_package = 2;
+		break;
 	case Legacy_3A:
 	case Loongson_3A:
 		loongson_sysconf.cores_per_node = 4;
@@ -221,6 +227,8 @@ void __init prom_lefi_init_env(void)
 		default:
 			break;
 		}
+	} else if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64R) {
+		loongson_fdt_blob = __dtb_loongson64_2core_2k1000_begin;
 	} else if ((read_c0_prid() & PRID_IMP_MASK) == PRID_IMP_LOONGSON_64G) {
 		if (loongson_sysconf.bridgetype == LS7A)
 			loongson_fdt_blob = __dtb_loongson64g_4core_ls7a_begin;

-- 
2.43.0