Support for booting XLP using FDT.

- update xlp_machdep.c to read arguments from FDT if FDT support is
  compiled in.
- define rmi_uart_bus_space, and use it as fdtbus_bs_tag
- update conf files for FDT support
- add default dts file xlp-basic.dts

sys/boot/fdt/dts/xlp-basic.dts

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2010 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * Netlogic Microsystems XLP8xx Device Tree Source.
+ *
+ * $FreeBSD$
+ */
+
+/dts-v1/;
+
+/ {
+	model = "netl,XLP8XX";
+	compatible = "XLP8XX";
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	aliases {
+		serial0 = &serial0;
+	};
+
+	soc {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "simple-bus";
+		ranges = <0x0>;
+		bus-frequency = <0>;
+
+		serial0: serial@30100 {
+			compatible = "ns16550";
+			reg = <0x30100 0x200>;
+			reg-shift = <2>;
+			current-speed = <115200>;
+			clock-frequency = <133000000>;
+			interrupts = <9>;
+		};
+
+	};
+
+	chosen {
+		stdin = "serial0";
+		stdout = "serial0";
+		cpumask = <0xffffffff>;
+		bootargs = "-v"; 
+	};
+};

sys/mips/conf/XLP

@@ -93,3 +93,8 @@ device		pci
 
 # Network
 device		ether
+#
+# FDT support 
+options         FDT
+options         FDT_DTB_STATIC
+makeoptions     FDT_DTS_FILE=xlp-basic.dts

sys/mips/conf/XLP64

@@ -95,3 +95,8 @@ device		pci
 
 # Network
 device		ether
+
+# FDT support 
+options         FDT
+options         FDT_DTB_STATIC
+makeoptions     FDT_DTS_FILE=xlp-basic.dts

sys/mips/include/bus.h

@@ -724,6 +724,7 @@ extern bus_space_tag_t mips_bus_space_generic;
 #if defined(CPU_RMI) || defined (CPU_NLM)
 extern bus_space_tag_t rmi_bus_space;
 extern bus_space_tag_t rmi_pci_bus_space;
+extern bus_space_tag_t rmi_uart_bus_space;
 #endif
 
 #include <machine/bus_dma.h>

sys/mips/include/fdt.h

@@ -48,6 +48,10 @@
 /*
  * Bus space tag. XXX endianess info needs to be derived from the blob.
  */
+#if defined(CPU_RMI) || defined(CPU_NLM)
+#define fdtbus_bs_tag	rmi_uart_bus_space
+#else
 #define fdtbus_bs_tag	NULL
+#endif
 
 #endif /* _MACHINE_FDT_H_ */

sys/mips/nlm/bus_space_rmi.c

@@ -686,3 +686,87 @@ rmi_bus_space_barrier(void *tag __unused, bus_space_handle_t bsh __unused,
     bus_size_t offset __unused, bus_size_t len __unused, int flags)
 {
 }
+
+/*
+ * need a special bus space for this, because the Netlogic SoC
+ * UART allows only 32 bit access to its registers
+ */
+
+static u_int8_t
+rmi_uart_bus_space_read_1(void *tag, bus_space_handle_t handle,
+    bus_size_t offset)
+{
+	return (u_int8_t)(*(volatile u_int32_t *)(handle + offset));
+}
+
+static void
+rmi_uart_bus_space_write_1(void *tag, bus_space_handle_t handle,
+    bus_size_t offset, u_int8_t value)
+{
+	*(volatile u_int32_t *)(handle + offset) =  value;
+}
+
+static struct bus_space local_rmi_uart_bus_space = {
+	/* cookie */
+	(void *)0,
+
+	/* mapping/unmapping */
+	rmi_bus_space_map,
+	rmi_bus_space_unmap,
+	rmi_bus_space_subregion,
+
+	/* allocation/deallocation */
+	NULL,
+	NULL,
+
+	/* barrier */
+	rmi_bus_space_barrier,
+
+	/* read (single) */
+	rmi_uart_bus_space_read_1, NULL, NULL, NULL,
+
+	/* read multiple */
+	NULL, NULL, NULL, NULL,
+
+	/* read region */
+	NULL, NULL, NULL, NULL,
+
+	/* write (single) */
+	rmi_uart_bus_space_write_1, NULL, NULL, NULL,
+
+	/* write multiple */
+	NULL, NULL, NULL, NULL,
+
+	/* write region */
+	NULL, NULL, NULL, NULL,
+
+	/* set multiple */
+	NULL, NULL, NULL, NULL,
+
+	/* set region */
+	NULL, NULL, NULL, NULL,
+
+	/* copy */
+	NULL, NULL, NULL, NULL,
+
+	/* read (single) stream */
+	NULL, NULL, NULL, NULL,
+
+	/* read multiple stream */
+	NULL, NULL, NULL, NULL,
+
+	/* read region stream */
+	NULL, NULL, NULL, NULL,
+
+	/* write (single) stream */
+	NULL, NULL, NULL, NULL,
+
+	/* write multiple stream */
+	NULL, NULL, NULL, NULL,
+
+	/* write region stream */
+	NULL, NULL, NULL, NULL,
+};
+
+/* generic bus_space tag */
+bus_space_tag_t rmi_uart_bus_space = &local_rmi_uart_bus_space;

sys/mips/nlm/uart_cpu_xlp.c

@@ -34,6 +34,9 @@
 /*
  * XLRMIPS: This file is hacked from arm/...
  */
+#include "opt_platform.h"
+
+#ifndef	FDT			/* use FDT uart when fdt is enable */
 #include "opt_uart.h"
 
 #include <sys/cdefs.h>
@@ -60,26 +63,6 @@ __FBSDID("$FreeBSD$");
 bus_space_tag_t uart_bus_space_io;
 bus_space_tag_t uart_bus_space_mem;
 
-/*
- * need a special bus space for this, because the Netlogic SoC
- * UART allows only 32 bit access to its registers
- */
-static struct bus_space nlm_uart_bussp;
-
-static u_int8_t
-nlm_uart_bussp_read_1(void *tag, bus_space_handle_t handle,
-    bus_size_t offset)
-{
-	return (u_int8_t)(*(volatile u_int32_t *)(handle + offset));
-}
-
-static void
-nlm_uart_bussp_write_1(void *tag, bus_space_handle_t handle,
-    bus_size_t offset, u_int8_t value)
-{
-	*(volatile u_int32_t *)(handle + offset) =  value;
-}
-
 int
 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
 {
@@ -89,14 +72,9 @@ uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
 int
 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
 {
-	/* Create custom bus space */
-	memcpy(&nlm_uart_bussp, rmi_bus_space, sizeof(nlm_uart_bussp));
-	nlm_uart_bussp.bs_r_1 = nlm_uart_bussp_read_1;
-	nlm_uart_bussp.bs_w_1 = nlm_uart_bussp_write_1;
-
 	di->ops = uart_getops(&uart_ns8250_class);
 	di->bas.chan = 0;
-	di->bas.bst = &nlm_uart_bussp;
+	di->bas.bst = rmi_uart_bus_space;
 	di->bas.bsh = nlm_get_uart_regbase(0, 0);
 	
 	di->bas.regshft = 2;
@@ -108,6 +86,7 @@ uart_cpu_getdev(int devtype, struct uart_devinfo *di)
 	di->parity = UART_PARITY_NONE;
 
 	uart_bus_space_io = NULL;
-	uart_bus_space_mem = &nlm_uart_bussp;
+	uart_bus_space_mem = rmi_uart_bus_space;
 	return (0);
 }
+#endif

sys/mips/nlm/xlp_machdep.c

@@ -31,6 +31,7 @@
 __FBSDID("$FreeBSD$");
 
 #include "opt_ddb.h"
+#include "opt_platform.h"
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -85,11 +86,14 @@ __FBSDID("$FreeBSD$");
 #include <mips/nlm/board.h>
 #include <mips/nlm/xlp.h>
 
+#ifdef FDT
+#include <dev/fdt/fdt_common.h>
+#include <dev/ofw/openfirm.h>
+#endif
+
 /* 4KB static data aread to keep a copy of the bootload env until
    the dynamic kenv is setup */
 char boot1_env[4096];
-int xlp_argc;
-char **xlp_argv, **xlp_envp;
 
 uint64_t xlp_cpu_frequency;
 uint64_t xlp_io_base = MIPS_PHYS_TO_KSEG1(XLP_DEFAULT_IO_BASE);
@@ -147,8 +151,13 @@ xlp_parse_mmu_options(void)
 	uint32_t cpu_map = xlp_hw_thread_mask;
 	uint32_t core0_thr_mask, core_thr_mask;
 
-#ifndef SMP /* Uniprocessor! */
+#ifdef SMP
-	if (cpu_map != 0x1) {
+	if (cpu_map == 0)
+		cpu_map = 0xffffffff;
+#else /* Uniprocessor! */
+	if (cpu_map == 0)
+		cpu_map = 0x1;
+	else if (cpu_map != 0x1) {
 		printf("WARNING: Starting uniprocessor kernel on cpumask [0x%lx]!\n"
 		    "WARNING: Other CPUs will be unused.\n", (u_long)cpu_map);
 		cpu_map = 0x1;
@@ -219,45 +228,107 @@ xlp_parse_mmu_options(void)
 	return;
 }
 
-static void 
+/* Parse cmd line args as env - copied from ar71xx */
-xlp_set_boot_flags(void)
+static void
+xlp_parse_bootargs(char *cmdline)
 {
-	char *p;
+	char *n, *v;
 
-	p = getenv("bootflags");
+	while ((v = strsep(&cmdline, " \n")) != NULL) {
-	if (p == NULL)
+		if (*v == '\0')
-		return;
+			continue;
-
+		if (*v == '-') {
-	for (; p && *p != '\0'; p++) {
+			while (*v != '\0') {
-		switch (*p) {
+				v++;
-		case 'd':
+				switch (*v) {
-		case 'D':
+				case 'a': boothowto |= RB_ASKNAME; break;
-			boothowto |= RB_KDB;
+				case 'd': boothowto |= RB_KDB; break;
-			break;
+				case 'g': boothowto |= RB_GDB; break;
-		case 'g':
+				case 's': boothowto |= RB_SINGLE; break;
-		case 'G':
+				case 'v': boothowto |= RB_VERBOSE; break;
-			boothowto |= RB_GDB;
+				}
-			break;
+			}
-		case 'v':
+		} else {
-		case 'V':
+			n = strsep(&v, "=");
-			boothowto |= RB_VERBOSE;
+			if (v == NULL)
-			break;
+				setenv(n, "1");
-
+			else
-		case 's':	/* single-user (default, supported for sanity) */
+				setenv(n, v);
-		case 'S':
-			boothowto |= RB_SINGLE;
-			break;
-
-		default:
-			printf("Unrecognized boot flag '%c'.\n", *p);
-			break;
 		}
 	}
-
-	freeenv(p);
-	return;
 }
 
+#ifdef FDT
+static void
+xlp_bootargs_init(__register_t arg)
+{
+	char	buf[2048]; /* early stack is big enough */
+	void	*dtbp;
+	phandle_t chosen;
+	ihandle_t mask;
+
+	dtbp = (void *)arg;
+#if defined(FDT_DTB_STATIC)
+	/*
+	 * In case the device tree blob was not passed as argument try
+	 * to use the statically embedded one.
+	 */
+	if (dtbp == NULL)
+		dtbp = &fdt_static_dtb;
+#endif
+	if (OF_install(OFW_FDT, 0) == FALSE)
+		while (1);
+	if (OF_init((void *)dtbp) != 0)
+		while (1);
+	if (fdt_immr_addr(xlp_io_base) != 0)
+		while (1);
+	OF_interpret("perform-fixup", 0);
+
+	chosen = OF_finddevice("/chosen");
+	if (OF_getprop(chosen, "cpumask", &mask, sizeof(mask)) == 0)
+		xlp_hw_thread_mask = mask;
+
+	if (OF_getprop(chosen, "bootargs", buf, sizeof(buf)) == 0)
+		xlp_parse_bootargs(buf);
+}
+#else
+/*
+ * arg is a pointer to the environment block, the format of the block is
+ * a=xyz\0b=pqr\0\0
+ */
+static void
+xlp_bootargs_init(__register_t arg)
+{
+	char	buf[2048]; /* early stack is big enough */
+	char	*p, *v, *n;
+	uint32_t mask;
+
+	p = (void *)arg;
+	while (*p != '\0') {
+		strlcpy(buf, p, sizeof(buf));
+		v = buf;
+		n = strsep(&v, "=");
+		if (v == NULL)
+			setenv(n, "1");
+		else
+			setenv(n, v);
+		p += strlen(p) + 1;
+	}
+
+	/* CPU mask can be passed thru env */
+	if (getenv_uint("cpumask", &mask) != 0)
+		xlp_hw_thread_mask = mask;
+
+	/* command line argument */
+	v = getenv("bootargs");
+	if (v != NULL) {
+		strlcpy(buf, v, sizeof(buf));
+		xlp_parse_bootargs(buf);
+		freeenv(v);
+	}
+}
+#endif
+
 static void
 mips_init(void)
 {
@@ -428,14 +499,6 @@ platform_start(__register_t a0 __unused,
     __register_t a2 __unused,
     __register_t a3 __unused)
 {
-	int i;
-
-	xlp_argc = 1;
-	/*
-	 * argv and envp are passed in array of 32bit pointers
-	 */
-	xlp_argv = NULL;
-	xlp_envp = NULL;
 
 	/* Initialize pcpu stuff */
 	mips_pcpu0_init();
@@ -443,10 +506,8 @@ platform_start(__register_t a0 __unused,
 	/* initialize console so that we have printf */
 	boothowto |= (RB_SERIAL | RB_MULTIPLE);	/* Use multiple consoles */
 
-	/* For now */
+	init_static_kenv(boot1_env, sizeof(boot1_env));
-	boothowto |= RB_VERBOSE;
+	xlp_bootargs_init(a0);
-	boothowto |= RB_SINGLE;
-	bootverbose++;
 
 	/* clockrate used by delay, so initialize it here */
 	xlp_cpu_frequency = xlp_get_cpu_frequency();
@@ -456,32 +517,10 @@ platform_start(__register_t a0 __unused,
 	/* Init console please */
 	cninit();
 
-	/* Environment */
-	printf("Args %#jx %#jx %#jx %#jx:\n", (intmax_t)a0,
-	    (intmax_t)a1, (intmax_t)a2, (intmax_t)a3);
-	xlp_hw_thread_mask = a0;
-	init_static_kenv(boot1_env, sizeof(boot1_env));
-	printf("Environment (from %d args):\n", xlp_argc - 1);
-	if (xlp_argc == 1)
-		printf("\tNone\n");
-	for (i = 1; i < xlp_argc; i++) {
-		char *n, *arg;
-
-		arg = (char *)(intptr_t)xlp_argv[i];
-		printf("\t%s\n", arg);
-		n = strsep(&arg, "=");
-		if (arg == NULL)
-			setenv(n, "1");
-		else
-			setenv(n, arg);
-	}
-
 	/* Early core init and fixes for errata */
 	xlp_setup_core();
 
-	xlp_set_boot_flags();
 	xlp_parse_mmu_options();
-	
 	xlp_mem_init();
 
 	bcopy(XLPResetEntry, (void *)MIPS_RESET_EXC_VEC,
@@ -491,6 +530,7 @@ platform_start(__register_t a0 __unused,
 	 * MIPS generic init 
 	 */
 	mips_init();
+
 	/*
 	 * XLP specific post initialization
  	 * initialize other on chip stuff