4 files changed, 56 insertions, 80 deletions

diff --git a/arch/mips/loongson64/Platform b/arch/mips/loongson64/Platform
index cc0b9c87f9ad..3e660d6d3c2b 100644
--- a/arch/mips/loongson64/Platform
+++ b/arch/mips/loongson64/Platform
@@ -6,28 +6,6 @@
 cflags-$(CONFIG_CPU_LOONGSON64)	+= -Wa,--trap
 
 #
-# Some versions of binutils, not currently mainline as of 2019/02/04, support
-# an -mfix-loongson3-llsc flag which emits a sync prior to each ll instruction
-# to work around a CPU bug (see __SYNC_loongson3_war in asm/sync.h for a
-# description).
-#
-# We disable this in order to prevent the assembler meddling with the
-# instruction that labels refer to, ie. if we label an ll instruction:
-#
-# 1: ll v0, 0(a0)
-#
-# ...then with the assembler fix applied the label may actually point at a sync
-# instruction inserted by the assembler, and if we were using the label in an
-# exception table the table would no longer contain the address of the ll
-# instruction.
-#
-# Avoid this by explicitly disabling that assembler behaviour. If upstream
-# binutils does not merge support for the flag then we can revisit & remove
-# this later - for now it ensures vendor toolchains don't cause problems.
-#
-cflags-$(CONFIG_CPU_LOONGSON64)	+= $(call as-option,-Wa$(comma)-mno-fix-loongson3-llsc,)
-
-#
 # binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
 # as MIPS64 R2; older versions as just R1.  This leaves the possibility open
 # that GCC might generate R2 code for -march=loongson3a which then is rejected
diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index ed75f7971261..cfa788bca871 100644
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/init.c
@@ -25,7 +25,6 @@ u32 node_id_offset;
 static void __init mips_nmi_setup(void)
 {
 	void *base;
-	extern char except_vec_nmi[];
 
 	base = (void *)(CAC_BASE + 0x380);
 	memcpy(base, except_vec_nmi, 0x80);
@@ -47,6 +46,51 @@ void virtual_early_config(void)
 	node_id_offset = 44;
 }
 
+void __init szmem(unsigned int node)
+{
+	u32 i, mem_type;
+	static unsigned long num_physpages;
+	u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
+
+	/* Parse memory information and activate */
+	for (i = 0; i < loongson_memmap->nr_map; i++) {
+		node_id = loongson_memmap->map[i].node_id;
+		if (node_id != node)
+			continue;
+
+		mem_type = loongson_memmap->map[i].mem_type;
+		mem_size = loongson_memmap->map[i].mem_size;
+		mem_start = loongson_memmap->map[i].mem_start;
+
+		switch (mem_type) {
+		case SYSTEM_RAM_LOW:
+		case SYSTEM_RAM_HIGH:
+			start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
+			node_psize = (mem_size << 20) >> PAGE_SHIFT;
+			end_pfn  = start_pfn + node_psize;
+			num_physpages += node_psize;
+			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
+				(u32)node_id, mem_type, mem_start, mem_size);
+			pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
+				start_pfn, end_pfn, num_physpages);
+			memblock_add_node(PFN_PHYS(start_pfn), PFN_PHYS(node_psize), node);
+			break;
+		case SYSTEM_RAM_RESERVED:
+			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
+				(u32)node_id, mem_type, mem_start, mem_size);
+			memblock_reserve(((node_id << 44) + mem_start), mem_size << 20);
+			break;
+		}
+	}
+}
+
+#ifndef CONFIG_NUMA
+static void __init prom_init_memory(void)
+{
+	szmem(0);
+}
+#endif
+
 void __init prom_init(void)
 {
 	fw_init_cmdline();
@@ -57,7 +101,11 @@ void __init prom_init(void)
 
 	loongson_sysconf.early_config();
 
+#ifdef CONFIG_NUMA
 	prom_init_numa_memory();
+#else
+	prom_init_memory();
+#endif
 
 	/* Hardcode to CPU UART 0 */
 	setup_8250_early_printk_port(TO_UNCAC(LOONGSON_REG_BASE + 0x1e0), 0, 1024);
@@ -66,10 +114,6 @@ void __init prom_init(void)
 	board_nmi_handler_setup = mips_nmi_setup;
 }
 
-void __init prom_free_prom_memory(void)
-{
-}
-
 static int __init add_legacy_isa_io(struct fwnode_handle *fwnode, resource_size_t hw_start,
 				    resource_size_t size)
 {
diff --git a/arch/mips/loongson64/numa.c b/arch/mips/loongson64/numa.c
index c6f0c48384f8..a8f57bf01285 100644
--- a/arch/mips/loongson64/numa.c
+++ b/arch/mips/loongson64/numa.c
@@ -25,6 +25,7 @@
 #include <asm/time.h>
 #include <asm/wbflush.h>
 #include <boot_param.h>
+#include <loongson.h>
 
 static struct pglist_data prealloc__node_data[MAX_NUMNODES];
 unsigned char __node_distances[MAX_NUMNODES][MAX_NUMNODES];
@@ -81,57 +82,6 @@ static void __init init_topology_matrix(void)
 	}
 }
 
-static void __init szmem(unsigned int node)
-{
-	u32 i, mem_type;
-	static unsigned long num_physpages;
-	u64 node_id, node_psize, start_pfn, end_pfn, mem_start, mem_size;
-
-	/* Parse memory information and activate */
-	for (i = 0; i < loongson_memmap->nr_map; i++) {
-		node_id = loongson_memmap->map[i].node_id;
-		if (node_id != node)
-			continue;
-
-		mem_type = loongson_memmap->map[i].mem_type;
-		mem_size = loongson_memmap->map[i].mem_size;
-		mem_start = loongson_memmap->map[i].mem_start;
-
-		switch (mem_type) {
-		case SYSTEM_RAM_LOW:
-			start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
-			node_psize = (mem_size << 20) >> PAGE_SHIFT;
-			end_pfn  = start_pfn + node_psize;
-			num_physpages += node_psize;
-			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
-				(u32)node_id, mem_type, mem_start, mem_size);
-			pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
-				start_pfn, end_pfn, num_physpages);
-			memblock_add_node(PFN_PHYS(start_pfn),
-				PFN_PHYS(node_psize), node);
-			break;
-		case SYSTEM_RAM_HIGH:
-			start_pfn = ((node_id << 44) + mem_start) >> PAGE_SHIFT;
-			node_psize = (mem_size << 20) >> PAGE_SHIFT;
-			end_pfn  = start_pfn + node_psize;
-			num_physpages += node_psize;
-			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
-				(u32)node_id, mem_type, mem_start, mem_size);
-			pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
-				start_pfn, end_pfn, num_physpages);
-			memblock_add_node(PFN_PHYS(start_pfn),
-				PFN_PHYS(node_psize), node);
-			break;
-		case SYSTEM_RAM_RESERVED:
-			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
-				(u32)node_id, mem_type, mem_start, mem_size);
-			memblock_reserve(((node_id << 44) + mem_start),
-				mem_size << 20);
-			break;
-		}
-	}
-}
-
 static void __init node_mem_init(unsigned int node)
 {
 	unsigned long node_addrspace_offset;
diff --git a/arch/mips/loongson64/smp.c b/arch/mips/loongson64/smp.c
index b8c1fc3158fd..6acde65f601b 100644
--- a/arch/mips/loongson64/smp.c
+++ b/arch/mips/loongson64/smp.c
@@ -483,7 +483,8 @@ static void __init loongson3_smp_setup(void)
 	init_cpu_possible(cpu_none_mask);
 
 	/* For unified kernel, NR_CPUS is the maximum possible value,
-	 * loongson_sysconf.nr_cpus is the really present value */
+	 * loongson_sysconf.nr_cpus is the really present value
+	 */
 	while (i < loongson_sysconf.nr_cpus) {
 		if (loongson_sysconf.reserved_cpus_mask & (1<<i)) {
 			/* Reserved physical CPU cores */
@@ -492,6 +493,8 @@ static void __init loongson3_smp_setup(void)
 			__cpu_number_map[i] = num;
 			__cpu_logical_map[num] = i;
 			set_cpu_possible(num, true);
+			/* Loongson processors are always grouped by 4 */
+			cpu_set_cluster(&cpu_data[num], i / 4);
 			num++;
 		}
 		i++;
@@ -567,7 +570,8 @@ static void loongson3_cpu_die(unsigned int cpu)
 /* To shutdown a core in Loongson 3, the target core should go to CKSEG1 and
  * flush all L1 entries at first. Then, another core (usually Core 0) can
  * safely disable the clock of the target core. loongson3_play_dead() is
- * called via CKSEG1 (uncached and unmmaped) */
+ * called via CKSEG1 (uncached and unmmaped)
+ */
 static void loongson3_type1_play_dead(int *state_addr)
 {
 	register int val;