MIPS: Add Loongson-3B support

Loongson-3B is a 8-cores processor. In general it looks like there are
two Loongson-3A integrated in one chip: 8 cores are separated into two
groups (two NUMA node), each node has its own local memory.

Of course there are some differences between one Loongson-3B and two
Loongson-3A. E.g., the base addresses of IPI registers of each node are
not the same; Loongson-3A use ChipConfig register to enable/disable
clock, but Loongson-3B use FreqControl register instead.

There are two revision of Loongson-3B, the first revision is called as
Loongson-3B1000, whose frequency is 1GHz and has a PRid 0x6306, the
second revision is called as Loongson-3B1500, whose frequency is 1.5GHz
and has a PRid 0x6307. Both revisions has a bug that clock cannot be
disabled at runtime, but this will be fixed in future.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Cc: John Crispin <john@phrozen.org>
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: linux-mips@linux-mips.org
Cc: Fuxin Zhang <zhangfx@lemote.com>
Cc: Zhangjin Wu <wuzhangjin@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/7188/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 30 insertions, 1 deletions

diff --git a/arch/mips/loongson/common/env.c b/arch/mips/loongson/common/env.c
index 33a13b9e436c..f15228550a22 100644
--- a/arch/mips/loongson/common/env.c
+++ b/arch/mips/loongson/common/env.c
@@ -28,6 +28,10 @@ struct efi_memory_map_loongson *loongson_memmap;
 struct loongson_system_configuration loongson_sysconf;
 
 u64 loongson_chipcfg[MAX_PACKAGES] = {0xffffffffbfc00180};
+u64 loongson_freqctrl[MAX_PACKAGES];
+
+unsigned long long smp_group[4];
+int cpuhotplug_workaround = 0;
 
 #define parse_even_earlier(res, option, p)                              \
 do {                                                                    \
@@ -82,10 +86,32 @@ void __init prom_init_env(void)
         if (ecpu->cputype == Loongson_3A) {
                 loongson_sysconf.cores_per_node = 4;
                 loongson_sysconf.cores_per_package = 4;
+                smp_group[0] = 0x900000003ff01000;
+                smp_group[1] = 0x900010003ff01000;
+                smp_group[2] = 0x900020003ff01000;
+                smp_group[3] = 0x900030003ff01000;
                 loongson_chipcfg[0] = 0x900000001fe00180;
                 loongson_chipcfg[1] = 0x900010001fe00180;
                 loongson_chipcfg[2] = 0x900020001fe00180;
                 loongson_chipcfg[3] = 0x900030001fe00180;
+                loongson_sysconf.ht_control_base = 0x90000EFDFB000000;
+        } else if (ecpu->cputype == Loongson_3B) {
+                loongson_sysconf.cores_per_node = 4; /* One chip has 2 nodes */
+                loongson_sysconf.cores_per_package = 8;
+                smp_group[0] = 0x900000003ff01000;
+                smp_group[1] = 0x900010003ff05000;
+                smp_group[2] = 0x900020003ff09000;
+                smp_group[3] = 0x900030003ff0d000;
+                loongson_chipcfg[0] = 0x900000001fe00180;
+                loongson_chipcfg[1] = 0x900020001fe00180;
+                loongson_chipcfg[2] = 0x900040001fe00180;
+                loongson_chipcfg[3] = 0x900060001fe00180;
+                loongson_freqctrl[0] = 0x900000001fe001d0;
+                loongson_freqctrl[1] = 0x900020001fe001d0;
+                loongson_freqctrl[2] = 0x900040001fe001d0;
+                loongson_freqctrl[3] = 0x900060001fe001d0;
+                loongson_sysconf.ht_control_base = 0x90001EFDFB000000;
+                cpuhotplug_workaround = 1;
         } else {
                 loongson_sysconf.cores_per_node = 1;
                 loongson_sysconf.cores_per_package = 1;
@@ -111,7 +137,6 @@ void __init prom_init_env(void)
         loongson_sysconf.poweroff_addr = boot_p->reset_system.Shutdown;
         loongson_sysconf.suspend_addr = boot_p->reset_system.DoSuspend;
 
-        loongson_sysconf.ht_control_base = 0x90000EFDFB000000;
         loongson_sysconf.vgabios_addr = boot_p->efi.smbios.vga_bios;
         pr_debug("Shutdown Addr: %llx, Restart Addr: %llx, VBIOS Addr: %llx\n",
                 loongson_sysconf.poweroff_addr, loongson_sysconf.restart_addr,
@@ -129,6 +154,10 @@ void __init prom_init_env(void)
                 case PRID_REV_LOONGSON3A:
                         cpu_clock_freq = 900000000;
                         break;
+                case PRID_REV_LOONGSON3B_R1:
+                case PRID_REV_LOONGSON3B_R2:
+                        cpu_clock_freq = 1000000000;
+                        break;
                 default:
                         cpu_clock_freq = 100000000;
                         break;