powerpc/chassis2: Change core numbering scheme

To align with chassis generation 2 spec, all cores are numbered in sequence.
The cores may reside across multiple clusters. Each cluster has zero to four
cores. The first available core is numbered as core 0. The second available
core is numbered as core 1 and so on.

Core clocks are generated by each clusters. To identify the cluster of each
core, topology registers are examined.

Cluster clock registers are reorganized to be easily indexed.

Signed-off-by: York Sun <yorksun@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

3 files changed, 72 insertions, 42 deletions

diff --git a/arch/powerpc/cpu/mpc85xx/release.S b/arch/powerpc/cpu/mpc85xx/release.S
index 467ea1045d..a4a21b037c 100644
--- a/arch/powerpc/cpu/mpc85xx/release.S
+++ b/arch/powerpc/cpu/mpc85xx/release.S
@@ -154,16 +154,12 @@ __secondary_start_page:
 	ori	r3,r3,toreset(__spin_table_addr)@l
 	lwz	r3,0(r3)
 
-	/*
-	 * r10 has the base address for the entry.
-	 * we cannot access it yet before setting up a new TLB
-	 */
 	mfspr	r0,SPRN_PIR
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 /*
  * PIR definition for Chassis 2
  * 0-17 Reserved (logic 0s)
- * 8-19 CHIP_ID,    2'b00      - SoC 1
+ * 18-19 CHIP_ID,    2'b00      - SoC 1
  *                  all others - reserved
  * 20-24 CLUSTER_ID 5'b00000   - CCM 1
  *                  all others - reserved
@@ -177,32 +173,33 @@ __secondary_start_page:
  *                       2'b11 - core 3
  * 29-31 THREAD_ID       3'b000 - thread 0
  *                       3'b001 - thread 1
+ *
+ * Power-on PIR increments threads by 0x01, cores within a cluster by 0x08
+ * and clusters by 0x20.
+ *
+ * We renumber PIR so that all threads in the system are consecutive.
  */
-	rlwinm  r4,r0,29,25,31
+
+	rlwinm	r8,r0,29,0x03	/* r8 = core within cluster */
+	srwi	r10,r0,5	/* r10 = cluster */
+
+	mulli	r5,r10,CONFIG_SYS_FSL_CORES_PER_CLUSTER
+	add	r5,r5,r8	/* for spin table index */
+	mulli	r4,r5,CONFIG_SYS_FSL_THREADS_PER_CORE	/* for PIR */
 #elif	defined(CONFIG_E500MC)
 	rlwinm	r4,r0,27,27,31
+	mr	r5,r4
 #else
 	mr	r4,r0
+	mr	r5,r4
 #endif
-	slwi	r8,r4,6	/* spin table is padded to 64 byte */
-	add	r10,r3,r8
 
-#ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
-	mfspr	r0,SPRN_PIR
 	/*
-	 * core 0 thread 0: pir reset value 0x00, new pir 0
-	 * core 0 thread 1: pir reset value 0x01, new pir 1
-	 * core 1 thread 0: pir reset value 0x08, new pir 2
-	 * core 1 thread 1: pir reset value 0x09, new pir 3
-	 * core 2 thread 0: pir reset value 0x10, new pir 4
-	 * core 2 thread 1: pir reset value 0x11, new pir 5
-	 * etc.
-	 *
-	 * Only thread 0 of each core will be running, updating PIR doesn't
-	 * need to deal with the thread bits.
+	 * r10 has the base address for the entry.
+	 * we cannot access it yet before setting up a new TLB
 	 */
-	rlwinm	r4,r0,30,24,30
-#endif
+	slwi	r8,r5,6	/* spin table is padded to 64 byte */
+	add	r10,r3,r8
 
 	mtspr	SPRN_PIR,r4	/* write to PIR register */
 
diff --git a/arch/powerpc/cpu/mpc85xx/speed.c b/arch/powerpc/cpu/mpc85xx/speed.c
index f00b1abe63..a4d6e9cc73 100644
--- a/arch/powerpc/cpu/mpc85xx/speed.c
+++ b/arch/powerpc/cpu/mpc85xx/speed.c
@@ -112,23 +112,20 @@ void get_sys_info (sys_info_t * sysInfo)
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
 	/*
 	 * Each cluster has up to 4 cores, sharing the same PLL selection.
-	 * The cluster assignment is fixed per SoC. There is no way identify the
-	 * assignment so far, presuming the "first configuration" which is to
-	 * fill the lower cluster group first before moving up to next group.
-	 * PLL1, PLL2, PLL3 are cluster group A, feeding core 0~3 on cluster 1
-	 * and core 4~7 on cluster 2
-	 * PLL4, PLL5, PLL6 are cluster group B, feeding core 8~11 on cluster 3
-	 * and core 12~15 on cluster 4 if existing
+	 * The cluster assignment is fixed per SoC. PLL1, PLL2, PLL3 are
+	 * cluster group A, feeding cores on cluster 1 and cluster 2.
+	 * PLL4, PLL5, PLL6 are cluster group B, feeding cores on cluster 3
+	 * and cluster 4 if existing.
 	 */
 	for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
-		u32 c_pll_sel = (in_be32(&clk->clkc0csr + (cpu / 4) * 8) >> 27)
+		int cluster = fsl_qoriq_core_to_cluster(cpu);
+		u32 c_pll_sel = (in_be32(&clk->clkcsr[cluster].clkcncsr) >> 27)
 				& 0xf;
 		u32 cplx_pll = core_cplx_PLL[c_pll_sel];
 		if (cplx_pll > 3)
 			printf("Unsupported architecture configuration"
 				" in function %s\n", __func__);
-		cplx_pll += (cpu / 8) * 3;
-
+		cplx_pll += (cluster / 2) * 3;
 		sysInfo->freqProcessor[cpu] =
 			 freqCC_PLL[cplx_pll] / core_cplx_PLL_div[c_pll_sel];
 	}
@@ -240,7 +237,8 @@ void get_sys_info (sys_info_t * sysInfo)
 #else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
 
 	for_each_cpu(i, cpu, cpu_numcores(), cpu_mask()) {
-		u32 c_pll_sel = (in_be32(&clk->clkc0csr + cpu*8) >> 27) & 0xf;
+		u32 c_pll_sel = (in_be32(&clk->clkcsr[cpu].clkcncsr) >> 27)
+				& 0xf;
 		u32 cplx_pll = core_cplx_PLL[c_pll_sel];
 
 		sysInfo->freqProcessor[cpu] =
diff --git a/arch/powerpc/cpu/mpc8xxx/cpu.c b/arch/powerpc/cpu/mpc8xxx/cpu.c
index 23e008e287..bc2685544e 100644
--- a/arch/powerpc/cpu/mpc8xxx/cpu.c
+++ b/arch/powerpc/cpu/mpc8xxx/cpu.c
@@ -103,35 +103,70 @@ static struct cpu_type cpu_type_list[] = {
 };
 
 #ifdef CONFIG_SYS_FSL_QORIQ_CHASSIS2
+static inline u32 init_type(u32 cluster, int init_id)
+{
+	ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	u32 idx = (cluster >> (init_id * 8)) & TP_CLUSTER_INIT_MASK;
+	u32 type = in_be32(&gur->tp_ityp[idx]);
+
+	if (type & TP_ITYP_AV)
+		return type;
+
+	return 0;
+}
+
 u32 compute_ppc_cpumask(void)
 {
-	ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
 	int i = 0, count = 0;
-	u32 cluster, mask = 0;
+	u32 cluster, type, mask = 0;
 
 	do {
 		int j;
-		cluster = in_be32(&gur->tp_cluster[i++].lower);
-		for (j = 0; j < 4; j++) {
-			u32 idx = (cluster >> (j*8)) & TP_CLUSTER_INIT_MASK;
-			u32 type = in_be32(&gur->tp_ityp[idx]);
-
-			if (type & TP_ITYP_AV) {
+		cluster = in_be32(&gur->tp_cluster[i].lower);
+		for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
+			type = init_type(cluster, j);
+			if (type) {
 				if (TP_ITYP_TYPE(type) == TP_ITYP_TYPE_PPC)
 					mask |= 1 << count;
+				count++;
 			}
-			count++;
 		}
+		i++;
 	} while ((cluster & TP_CLUSTER_EOC) != TP_CLUSTER_EOC);
 
 	return mask;
 }
+
+int fsl_qoriq_core_to_cluster(unsigned int core)
+{
+	ccsr_gur_t *gur = (void __iomem *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
+	int i = 0, count = 0;
+	u32 cluster;
+
+	do {
+		int j;
+		cluster = in_be32(&gur->tp_cluster[i].lower);
+		for (j = 0; j < TP_INIT_PER_CLUSTER; j++) {
+			if (init_type(cluster, j)) {
+				if (count == core)
+					return i;
+				count++;
+			}
+		}
+		i++;
+	} while ((cluster & TP_CLUSTER_EOC) != TP_CLUSTER_EOC);
+
+	return -1;	/* cannot identify the cluster */
+}
+
 #else /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
 /*
  * Before chassis genenration 2, the cpumask should be hard-coded.
  * In case of cpu type unknown or cpumask unset, use 1 as fail save.
  */
 #define compute_ppc_cpumask()	1
+#define fsl_qoriq_core_to_cluster(x) x
 #endif /* CONFIG_SYS_FSL_QORIQ_CHASSIS2 */
 
 static struct cpu_type cpu_type_unknown = CPU_TYPE_ENTRY(Unknown, Unknown, 0);