MIPS: Netlogic: SYS block updates of XLP9XX

Add the SYS block registers for XLP9XX, most of them have changed.
The wakeup sequence has been updated to set the coherent mode from
the main thread rather than the woken up thread.
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/6280/

arch/mips/include/asm/netlogic/xlp-hal/sys.h

@@ -147,13 +147,29 @@
 #define SYS_SYS_PLL_MEM_REQ			0x2a3
 #define SYS_PLL_MEM_STAT			0x2a4
 
+/* Registers changed on 9XX */
+#define SYS_9XX_POWER_ON_RESET_CFG		0x00
+#define SYS_9XX_CHIP_RESET			0x01
+#define SYS_9XX_CPU_RESET			0x02
+#define SYS_9XX_CPU_NONCOHERENT_MODE		0x03
+
+/* XLP 9XX fuse block registers */
+#define FUSE_9XX_DEVCFG6			0xc6
+
 #ifndef __ASSEMBLY__
 
 #define nlm_read_sys_reg(b, r)		nlm_read_reg(b, r)
 #define nlm_write_sys_reg(b, r, v)	nlm_write_reg(b, r, v)
-#define nlm_get_sys_pcibase(node) nlm_pcicfg_base(XLP_IO_SYS_OFFSET(node))
+#define nlm_get_sys_pcibase(node)	nlm_pcicfg_base(cpu_is_xlp9xx() ? \
+		XLP9XX_IO_SYS_OFFSET(node) : XLP_IO_SYS_OFFSET(node))
 #define nlm_get_sys_regbase(node) (nlm_get_sys_pcibase(node) + XLP_IO_PCI_HDRSZ)
 
+/* XLP9XX fuse block */
+#define nlm_get_fuse_pcibase(node)	\
+			nlm_pcicfg_base(XLP9XX_IO_FUSE_OFFSET(node))
+#define nlm_get_fuse_regbase(node)	\
+			(nlm_get_fuse_pcibase(node) + XLP_IO_PCI_HDRSZ)
+
 unsigned int nlm_get_pic_frequency(int node);
 #endif
 #endif

arch/mips/netlogic/common/reset.S

@@ -159,6 +159,13 @@ FEXPORT(nlm_reset_entry)
 	nop
 
 1:	/* Entry point on core wakeup */
+	mfc0	t0, CP0_EBASE, 0	/* processor ID */
+	andi	t0, 0xff00
+	li	t1, 0x1500		/* XLP 9xx */
+	beq	t0, t1, 2f		/* does not need to set coherent */
+	nop
+
+	/* set bit in SYS coherent register for the core */
 	mfc0	t0, CP0_EBASE, 1
 	mfc0	t1, CP0_EBASE, 1
 	srl	t1, 5
@@ -180,6 +187,7 @@ FEXPORT(nlm_reset_entry)
 	lw	t1, 0(t2)
 	sync
 
+2:
 	/* Configure LSU on Non-0 Cores. */
 	xlp_config_lsu
 	/* FALL THROUGH */

arch/mips/netlogic/xlp/nlm_hal.c

@@ -174,7 +174,10 @@ unsigned int nlm_get_core_frequency(int node, int core)
 	uint64_t num, sysbase;
 
 	sysbase = nlm_get_node(node)->sysbase;
-	rstval = nlm_read_sys_reg(sysbase, SYS_POWER_ON_RESET_CFG);
+	if (cpu_is_xlp9xx())
+		rstval = nlm_read_sys_reg(sysbase, SYS_9XX_POWER_ON_RESET_CFG);
+	else
+		rstval = nlm_read_sys_reg(sysbase, SYS_POWER_ON_RESET_CFG);
 	if (cpu_is_xlpii()) {
 		num = 1000000ULL * (400 * 3 + 100 * (rstval >> 26));
 		denom = 3;

arch/mips/netlogic/xlp/setup.c

@@ -56,7 +56,10 @@ static void nlm_linux_exit(void)
 {
 	uint64_t sysbase = nlm_get_node(0)->sysbase;
 
-	nlm_write_sys_reg(sysbase, SYS_CHIP_RESET, 1);
+	if (cpu_is_xlp9xx())
+		nlm_write_sys_reg(sysbase, SYS_9XX_CHIP_RESET, 1);
+	else
+		nlm_write_sys_reg(sysbase, SYS_CHIP_RESET, 1);
 	for ( ; ; )
 		cpu_wait();
 }

arch/mips/netlogic/xlp/wakeup.c

@@ -54,7 +54,7 @@
 static int xlp_wakeup_core(uint64_t sysbase, int node, int core)
 {
 	uint32_t coremask, value;
-	int count;
+	int count, resetreg;
 
 	coremask = (1 << core);
 
@@ -65,12 +65,24 @@ static int xlp_wakeup_core(uint64_t sysbase, int node, int core)
 		nlm_write_sys_reg(sysbase, SYS_CORE_DFS_DIS_CTRL, value);
 	}
 
+	/* On 9XX, mark coherent first */
+	if (cpu_is_xlp9xx()) {
+		value = nlm_read_sys_reg(sysbase, SYS_9XX_CPU_NONCOHERENT_MODE);
+		value &= ~coremask;
+		nlm_write_sys_reg(sysbase, SYS_9XX_CPU_NONCOHERENT_MODE, value);
+	}
+
 	/* Remove CPU Reset */
-	value = nlm_read_sys_reg(sysbase, SYS_CPU_RESET);
+	resetreg = cpu_is_xlp9xx() ? SYS_9XX_CPU_RESET : SYS_CPU_RESET;
+	value = nlm_read_sys_reg(sysbase, resetreg);
 	value &= ~coremask;
-	nlm_write_sys_reg(sysbase, SYS_CPU_RESET, value);
+	nlm_write_sys_reg(sysbase, resetreg, value);
+
+	/* We are done on 9XX */
+	if (cpu_is_xlp9xx())
+		return 1;
 
-	/* Poll for CPU to mark itself coherent */
+	/* Poll for CPU to mark itself coherent on other type of XLP */
 	count = 100000;
 	do {
 		value = nlm_read_sys_reg(sysbase, SYS_CPU_NONCOHERENT_MODE);
@@ -98,33 +110,48 @@ static int wait_for_cpus(int cpu, int bootcpu)
 static void xlp_enable_secondary_cores(const cpumask_t *wakeup_mask)
 {
 	struct nlm_soc_info *nodep;
-	uint64_t syspcibase;
+	uint64_t syspcibase, fusebase;
 	uint32_t syscoremask, mask, fusemask;
 	int core, n, cpu;
 
 	for (n = 0; n < NLM_NR_NODES; n++) {
-		syspcibase = nlm_get_sys_pcibase(n);
-		if (nlm_read_reg(syspcibase, 0) == 0xffffffff)
-			break;
+		if (n != 0) {
+			/* check if node exists and is online */
+			if (cpu_is_xlp9xx()) {
+				int b = xlp9xx_get_socbus(n);
+				pr_info("Node %d SoC PCI bus %d.\n", n, b);
+				if (b == 0)
+					break;
+			} else {
+				syspcibase = nlm_get_sys_pcibase(n);
+				if (nlm_read_reg(syspcibase, 0) == 0xffffffff)
+					break;
+			}
+			nlm_node_init(n);
+		}
 
 		/* read cores in reset from SYS */
-		if (n != 0)
-			nlm_node_init(n);
 		nodep = nlm_get_node(n);
 
-		fusemask = nlm_read_sys_reg(nodep->sysbase,
-					SYS_EFUSE_DEVICE_CFG_STATUS0);
-		switch (read_c0_prid() & 0xff00) {
-		case PRID_IMP_NETLOGIC_XLP3XX:
-			mask = 0xf;
-			break;
-		case PRID_IMP_NETLOGIC_XLP2XX:
-			mask = 0x3;
-			break;
-		case PRID_IMP_NETLOGIC_XLP8XX:
-		default:
-			mask = 0xff;
-			break;
+		if (cpu_is_xlp9xx()) {
+			fusebase = nlm_get_fuse_regbase(n);
+			fusemask = nlm_read_reg(fusebase, FUSE_9XX_DEVCFG6);
+			mask = 0xfffff;
+		} else {
+			fusemask = nlm_read_sys_reg(nodep->sysbase,
+						SYS_EFUSE_DEVICE_CFG_STATUS0);
+			switch (read_c0_prid() & 0xff00) {
+			case PRID_IMP_NETLOGIC_XLP3XX:
+				mask = 0xf;
+				break;
+			case PRID_IMP_NETLOGIC_XLP2XX:
+				mask = 0x3;
+				break;
+			case PRID_IMP_NETLOGIC_XLP8XX:
+			default:
+				mask = 0xff;
+				break;
+			}
 		}
 
 		/*
@@ -137,6 +164,7 @@ static void xlp_enable_secondary_cores(const cpumask_t *wakeup_mask)
 		if (n == 0)
 			nodep->coremask = 1;
 
+		pr_info("Node %d - SYS/FUSE coremask %x\n", n, syscoremask);
 		for (core = 0; core < NLM_CORES_PER_NODE; core++) {
 			/* we will be on node 0 core 0 */
 			if (n == 0 && core == 0)