Merge branch 'master' of git://www.denx.de/git/u-boot-sparc

1 files changed, 1078 insertions, 0 deletions

diff --git a/cpu/leon3/prom.c b/cpu/leon3/prom.c
new file mode 100644
index 000000000..9fa2d040e
--- /dev/null
+++ b/cpu/leon3/prom.c
@@ -0,0 +1,1078 @@
+/* prom.c - emulates a sparc v0 PROM for the linux kernel.
+ *
+ * Copyright (C) 2003 Konrad Eisele <eiselekd@web.de>
+ * Copyright (C) 2004 Stefan Holst <mail@s-holst.de>
+ * Copyright (C) 2007 Daniel Hellstrom <daniel@gaisler.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <asm/prom.h>
+#include <asm/machines.h>
+#include <asm/srmmu.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+#include <asm/leon.h>
+#include <ambapp.h>
+
+#include <config.h>
+/*
+#define PRINT_ROM_VEC
+*/
+extern struct linux_romvec *kernel_arg_promvec;
+extern ambapp_dev_apbuart *leon3_apbuart;
+
+#define PROM_PGT __attribute__ ((__section__ (".prom.pgt")))
+#define PROM_TEXT __attribute__ ((__section__ (".prom.text")))
+#define PROM_DATA __attribute__ ((__section__ (".prom.data")))
+
+ambapp_dev_gptimer *gptimer;
+
+/* for __va */
+extern int __prom_start;
+#define PAGE_OFFSET 0xf0000000
+#define phys_base CFG_SDRAM_BASE
+#define PROM_OFFS 8192
+#define PROM_SIZE_MASK (PROM_OFFS-1)
+#define __va(x) ( \
+	(void *)( ((unsigned long)(x))-PROM_OFFS+ \
+	(CFG_PROM_OFFSET-phys_base)+PAGE_OFFSET-TEXT_BASE ) \
+	)
+#define __phy(x) ((void *)(((unsigned long)(x))-PROM_OFFS+CFG_PROM_OFFSET-TEXT_BASE))
+
+struct property {
+	char *name;
+	char *value;
+	int length;
+};
+
+struct node {
+	int level;
+	struct property *properties;
+};
+
+static void leon_reboot(char *bcommand);
+static void leon_halt(void);
+static int leon_nbputchar(int c);
+static int leon_nbgetchar(void);
+
+static int no_nextnode(int node);
+static int no_child(int node);
+static int no_proplen(int node, char *name);
+static int no_getprop(int node, char *name, char *value);
+static int no_setprop(int node, char *name, char *value, int len);
+static char *no_nextprop(int node, char *name);
+
+static struct property PROM_TEXT *find_property(int node, char *name);
+static int PROM_TEXT leon_strcmp(const char *s1, const char *s2);
+static void *PROM_TEXT leon_memcpy(void *dest, const void *src, size_t n);
+static void PROM_TEXT leon_reboot_physical(char *bcommand);
+
+void __inline__ leon_flush_cache_all(void)
+{
+	__asm__ __volatile__(" flush ");
+      __asm__ __volatile__("sta %%g0, [%%g0] %0\n\t"::"i"(ASI_DFLUSH):"memory");
+}
+
+void __inline__ leon_flush_tlb_all(void)
+{
+	leon_flush_cache_all();
+	__asm__ __volatile__("sta %%g0, [%0] %1\n\t"::"r"(0x400),
+			     "i"(ASI_MMUFLUSH):"memory");
+}
+
+typedef struct {
+	unsigned int ctx_table[256];
+	unsigned int pgd_table[256];
+} sparc_srmmu_setup;
+
+sparc_srmmu_setup srmmu_tables PROM_PGT = {
+	{0},
+	{0x1e,
+	 0x10001e,
+	 0x20001e,
+	 0x30001e,
+	 0x40001e,
+	 0x50001e,
+	 0x60001e,
+	 0x70001e,
+	 0x80001e,
+	 0x90001e,
+	 0xa0001e,
+	 0xb0001e,
+	 0xc0001e,
+	 0xd0001e,
+	 0xe0001e,
+	 0xf0001e,
+	 0x100001e,
+	 0x110001e,
+	 0x120001e,
+	 0x130001e,
+	 0x140001e,
+	 0x150001e,
+	 0x160001e,
+	 0x170001e,
+	 0x180001e,
+	 0x190001e,
+	 0x1a0001e,
+	 0x1b0001e,
+	 0x1c0001e,
+	 0x1d0001e,
+	 0x1e0001e,
+	 0x1f0001e,
+	 0x200001e,
+	 0x210001e,
+	 0x220001e,
+	 0x230001e,
+	 0x240001e,
+	 0x250001e,
+	 0x260001e,
+	 0x270001e,
+	 0x280001e,
+	 0x290001e,
+	 0x2a0001e,
+	 0x2b0001e,
+	 0x2c0001e,
+	 0x2d0001e,
+	 0x2e0001e,
+	 0x2f0001e,
+	 0x300001e,
+	 0x310001e,
+	 0x320001e,
+	 0x330001e,
+	 0x340001e,
+	 0x350001e,
+	 0x360001e,
+	 0x370001e,
+	 0x380001e,
+	 0x390001e,
+	 0x3a0001e,
+	 0x3b0001e,
+	 0x3c0001e,
+	 0x3d0001e,
+	 0x3e0001e,
+	 0x3f0001e,
+	 0x400001e,
+	 0x410001e,
+	 0x420001e,
+	 0x430001e,
+	 0x440001e,
+	 0x450001e,
+	 0x460001e,
+	 0x470001e,
+	 0x480001e,
+	 0x490001e,
+	 0x4a0001e,
+	 0x4b0001e,
+	 0x4c0001e,
+	 0x4d0001e,
+	 0x4e0001e,
+	 0x4f0001e,
+	 0x500001e,
+	 0x510001e,
+	 0x520001e,
+	 0x530001e,
+	 0x540001e,
+	 0x550001e,
+	 0x560001e,
+	 0x570001e,
+	 0x580001e,
+	 0x590001e,
+	 0x5a0001e,
+	 0x5b0001e,
+	 0x5c0001e,
+	 0x5d0001e,
+	 0x5e0001e,
+	 0x5f0001e,
+	 0x600001e,
+	 0x610001e,
+	 0x620001e,
+	 0x630001e,
+	 0x640001e,
+	 0x650001e,
+	 0x660001e,
+	 0x670001e,
+	 0x680001e,
+	 0x690001e,
+	 0x6a0001e,
+	 0x6b0001e,
+	 0x6c0001e,
+	 0x6d0001e,
+	 0x6e0001e,
+	 0x6f0001e,
+	 0x700001e,
+	 0x710001e,
+	 0x720001e,
+	 0x730001e,
+	 0x740001e,
+	 0x750001e,
+	 0x760001e,
+	 0x770001e,
+	 0x780001e,
+	 0x790001e,
+	 0x7a0001e,
+	 0x7b0001e,
+	 0x7c0001e,
+	 0x7d0001e,
+	 0x7e0001e,
+	 0x7f0001e,
+	 0x800001e,
+	 0x810001e,
+	 0x820001e,
+	 0x830001e,
+	 0x840001e,
+	 0x850001e,
+	 0x860001e,
+	 0x870001e,
+	 0x880001e,
+	 0x890001e,
+	 0x8a0001e,
+	 0x8b0001e,
+	 0x8c0001e,
+	 0x8d0001e,
+	 0x8e0001e,
+	 0x8f0001e,
+	 0x900001e,
+	 0x910001e,
+	 0x920001e,
+	 0x930001e,
+	 0x940001e,
+	 0x950001e,
+	 0x960001e,
+	 0x970001e,
+	 0x980001e,
+	 0x990001e,
+	 0x9a0001e,
+	 0x9b0001e,
+	 0x9c0001e,
+	 0x9d0001e,
+	 0x9e0001e,
+	 0x9f0001e,
+	 0xa00001e,
+	 0xa10001e,
+	 0xa20001e,
+	 0xa30001e,
+	 0xa40001e,
+	 0xa50001e,
+	 0xa60001e,
+	 0xa70001e,
+	 0xa80001e,
+	 0xa90001e,
+	 0xaa0001e,
+	 0xab0001e,
+	 0xac0001e,
+	 0xad0001e,
+	 0xae0001e,
+	 0xaf0001e,
+	 0xb00001e,
+	 0xb10001e,
+	 0xb20001e,
+	 0xb30001e,
+	 0xb40001e,
+	 0xb50001e,
+	 0xb60001e,
+	 0xb70001e,
+	 0xb80001e,
+	 0xb90001e,
+	 0xba0001e,
+	 0xbb0001e,
+	 0xbc0001e,
+	 0xbd0001e,
+	 0xbe0001e,
+	 0xbf0001e,
+	 0xc00001e,
+	 0xc10001e,
+	 0xc20001e,
+	 0xc30001e,
+	 0xc40001e,
+	 0xc50001e,
+	 0xc60001e,
+	 0xc70001e,
+	 0xc80001e,
+	 0xc90001e,
+	 0xca0001e,
+	 0xcb0001e,
+	 0xcc0001e,
+	 0xcd0001e,
+	 0xce0001e,
+	 0xcf0001e,
+	 0xd00001e,
+	 0xd10001e,
+	 0xd20001e,
+	 0xd30001e,
+	 0xd40001e,
+	 0xd50001e,
+	 0xd60001e,
+	 0xd70001e,
+	 0xd80001e,
+	 0xd90001e,
+	 0xda0001e,
+	 0xdb0001e,
+	 0xdc0001e,
+	 0xdd0001e,
+	 0xde0001e,
+	 0xdf0001e,
+	 0xe00001e,
+	 0xe10001e,
+	 0xe20001e,
+	 0xe30001e,
+	 0xe40001e,
+	 0xe50001e,
+	 0xe60001e,
+	 0xe70001e,
+	 0xe80001e,
+	 0xe90001e,
+	 0xea0001e,
+	 0xeb0001e,
+	 0xec0001e,
+	 0xed0001e,
+	 0xee0001e,
+	 0xef0001e,
+	 0x400001e		/* default */
+	 }
+};
+
+/* a self contained prom info structure */
+struct leon_reloc_func {
+	struct property *(*find_property) (int node, char *name);
+	int (*strcmp) (char *s1, char *s2);
+	void *(*memcpy) (void *dest, const void *src, size_t n);
+	void (*reboot_physical) (char *cmd);
+	ambapp_dev_apbuart *leon3_apbuart;
+};
+
+struct leon_prom_info {
+	int freq_khz;
+	int leon_nctx;
+	int mids[32];
+	int baudrates[2];
+	struct leon_reloc_func reloc_funcs;
+	struct property root_properties[4];
+	struct property cpu_properties[7];
+#undef  CPUENTRY
+#define CPUENTRY(idx) struct property cpu_properties##idx[4]
+	 CPUENTRY(1);
+	 CPUENTRY(2);
+	 CPUENTRY(3);
+	 CPUENTRY(4);
+	 CPUENTRY(5);
+	 CPUENTRY(6);
+	 CPUENTRY(7);
+	 CPUENTRY(8);
+	 CPUENTRY(9);
+	 CPUENTRY(10);
+	 CPUENTRY(11);
+	 CPUENTRY(12);
+	 CPUENTRY(13);
+	 CPUENTRY(14);
+	 CPUENTRY(15);
+	 CPUENTRY(16);
+	 CPUENTRY(17);
+	 CPUENTRY(18);
+	 CPUENTRY(19);
+	 CPUENTRY(20);
+	 CPUENTRY(21);
+	 CPUENTRY(22);
+	 CPUENTRY(23);
+	 CPUENTRY(24);
+	 CPUENTRY(25);
+	 CPUENTRY(26);
+	 CPUENTRY(27);
+	 CPUENTRY(28);
+	 CPUENTRY(29);
+	 CPUENTRY(30);
+	 CPUENTRY(31);
+	struct idprom idprom;
+	struct linux_nodeops nodeops;
+	struct linux_mlist_v0 *totphys_p;
+	struct linux_mlist_v0 totphys;
+	struct linux_mlist_v0 *avail_p;
+	struct linux_mlist_v0 avail;
+	struct linux_mlist_v0 *prommap_p;
+	void (*synchook) (void);
+	struct linux_arguments_v0 *bootargs_p;
+	struct linux_arguments_v0 bootargs;
+	struct linux_romvec romvec;
+	struct node nodes[35];
+	char s_device_type[12];
+	char s_cpu[4];
+	char s_mid[4];
+	char s_idprom[7];
+	char s_compatability[14];
+	char s_leon2[6];
+	char s_mmu_nctx[9];
+	char s_frequency[16];
+	char s_uart1_baud[11];
+	char s_uart2_baud[11];
+	char arg[256];
+};
+
+/* static prom info */
+static struct leon_prom_info PROM_DATA spi = {
+	CONFIG_SYS_CLK_FREQ / 1000,
+	256,
+	{
+#undef	CPUENTRY
+#define	CPUENTRY(idx) idx
+	 CPUENTRY(0),
+	 CPUENTRY(1),
+	 CPUENTRY(2),
+	 CPUENTRY(3),
+	 CPUENTRY(4),
+	 CPUENTRY(5),
+	 CPUENTRY(6),
+	 CPUENTRY(7),
+	 CPUENTRY(8),
+	 CPUENTRY(9),
+	 CPUENTRY(10),
+	 CPUENTRY(11),
+	 CPUENTRY(12),
+	 CPUENTRY(13),
+	 CPUENTRY(14),
+	 CPUENTRY(15),
+	 CPUENTRY(16),
+	 CPUENTRY(17),
+	 CPUENTRY(18),
+	 CPUENTRY(19),
+	 CPUENTRY(20),
+	 CPUENTRY(21),
+	 CPUENTRY(22),
+	 CPUENTRY(23),
+	 CPUENTRY(24),
+	 CPUENTRY(25),
+	 CPUENTRY(26),
+	 CPUENTRY(27),
+	 CPUENTRY(28),
+	 CPUENTRY(29),
+	 CPUENTRY(30),
+	 31},
+	{38400, 38400},
+	{
+	 __va(find_property),
+	 __va(leon_strcmp),
+	 __va(leon_memcpy),
+	 __phy(leon_reboot_physical),
+	 },
+	{
+	 {__va(spi.s_device_type), __va(spi.s_idprom), 4},
+	 {__va(spi.s_idprom), (char *)__va(&spi.idprom), sizeof(struct idprom)},
+	 {__va(spi.s_compatability), __va(spi.s_leon2), 5},
+	 {NULL, NULL, -1}
+	 },
+	{
+	 {__va(spi.s_device_type), __va(spi.s_cpu), 4},
+	 {__va(spi.s_mid), __va(&spi.mids[0]), 4},
+	 {__va(spi.s_mmu_nctx), (char *)__va(&spi.leon_nctx), 4},
+	 {__va(spi.s_frequency), (char *)__va(&spi.freq_khz), 4},
+	 {__va(spi.s_uart1_baud), (char *)__va(&spi.baudrates[0]), 4},
+	 {__va(spi.s_uart2_baud), (char *)__va(&spi.baudrates[1]), 4},
+	 {NULL, NULL, -1}
+	 },
+#undef  CPUENTRY
+#define CPUENTRY(idx) \
+	{ /* cpu_properties */						\
+		{__va(spi.s_device_type), __va(spi.s_cpu), 4},		\
+		{__va(spi.s_mid), __va(&spi.mids[idx]), 4},			\
+		{__va(spi.s_frequency), (char *)__va(&spi.freq_khz), 4},	\
+		{NULL, NULL, -1}						\
+	}
+	CPUENTRY(1),
+	CPUENTRY(2),
+	CPUENTRY(3),
+	CPUENTRY(4),
+	CPUENTRY(5),
+	CPUENTRY(6),
+	CPUENTRY(7),
+	CPUENTRY(8),
+	CPUENTRY(9),
+	CPUENTRY(10),
+	CPUENTRY(11),
+	CPUENTRY(12),
+	CPUENTRY(13),
+	CPUENTRY(14),
+	CPUENTRY(15),
+	CPUENTRY(16),
+	CPUENTRY(17),
+	CPUENTRY(18),
+	CPUENTRY(19),
+	CPUENTRY(20),
+	CPUENTRY(21),
+	CPUENTRY(22),
+	CPUENTRY(23),
+	CPUENTRY(24),
+	CPUENTRY(25),
+	CPUENTRY(26),
+	CPUENTRY(27),
+	CPUENTRY(28),
+	CPUENTRY(29),
+	CPUENTRY(30),
+	CPUENTRY(31),
+	{
+	 0x01,			/* format */
+	 M_LEON2 | M_LEON2_SOC,	/* machine type */
+	 {0, 0, 0, 0, 0, 0},	/* eth */
+	 0,			/* date */
+	 0,			/* sernum */
+	 0,			/* checksum */
+	 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}	/* reserved */
+	 },
+	{
+	 __va(no_nextnode),
+	 __va(no_child),
+	 __va(no_proplen),
+	 __va(no_getprop),
+	 __va(no_setprop),
+	 __va(no_nextprop)
+	 },
+	__va(&spi.totphys),
+	{
+	 NULL,
+	 (char *)CFG_SDRAM_BASE,
+	 0,
+	 },
+	__va(&spi.avail),
+	{
+	 NULL,
+	 (char *)CFG_SDRAM_BASE,
+	 0,
+	 },
+	NULL,			/* prommap_p */
+	NULL,
+	__va(&spi.bootargs),
+	{
+	 {NULL, __va(spi.arg), NULL /*... */ },
+	 /*... */
+	 },
+	{
+	 0,
+	 0,			/* sun4c v0 prom */
+	 0, 0,
+	 {__va(&spi.totphys_p), __va(&spi.prommap_p), __va(&spi.avail_p)},
+	 __va(&spi.nodeops),
+	 NULL, {NULL /* ... */ },
+	 NULL, NULL,
+	 NULL, NULL,		/* pv_getchar, pv_putchar */
+	 __va(leon_nbgetchar), __va(leon_nbputchar),
+	 NULL,
+	 __va(leon_reboot),
+	 NULL,
+	 NULL,
+	 NULL,
+	 __va(leon_halt),
+	 __va(&spi.synchook),
+	 {NULL},
+	 __va(&spi.bootargs_p)
+	 /*... */
+	 },
+	{
+	 {0, __va(spi.root_properties + 3) /* NULL, NULL, -1 */ },
+	 {0, __va(spi.root_properties)},
+	 /* cpu 0, must be spi.nodes[2] see leon_prom_init() */
+	 {1, __va(spi.cpu_properties)},
+
+#undef  CPUENTRY
+#define CPUENTRY(idx) \
+	  {1, __va(spi.cpu_properties##idx) }	/* cpu <idx> */
+	 CPUENTRY(1),
+	 CPUENTRY(2),
+	 CPUENTRY(3),
+	 CPUENTRY(4),
+	 CPUENTRY(5),
+	 CPUENTRY(6),
+	 CPUENTRY(7),
+	 CPUENTRY(8),
+	 CPUENTRY(9),
+	 CPUENTRY(10),
+	 CPUENTRY(11),
+	 CPUENTRY(12),
+	 CPUENTRY(13),
+	 CPUENTRY(14),
+	 CPUENTRY(15),
+	 CPUENTRY(16),
+	 CPUENTRY(17),
+	 CPUENTRY(18),
+	 CPUENTRY(19),
+	 CPUENTRY(20),
+	 CPUENTRY(21),
+	 CPUENTRY(22),
+	 CPUENTRY(23),
+	 CPUENTRY(24),
+	 CPUENTRY(25),
+	 CPUENTRY(26),
+	 CPUENTRY(27),
+	 CPUENTRY(28),
+	 CPUENTRY(29),
+	 CPUENTRY(30),
+	 CPUENTRY(31),
+	 {-1, __va(spi.root_properties + 3) /* NULL, NULL, -1 */ }
+	 },
+	"device_type",
+	"cpu",
+	"mid",
+	"idprom",
+	"compatability",
+	"leon2",
+	"mmu-nctx",
+	"clock-frequency",
+	"uart1_baud",
+	"uart2_baud",
+	CONFIG_DEFAULT_KERNEL_COMMAND_LINE
+};
+
+/* from arch/sparc/kernel/setup.c */
+#define RAMDISK_LOAD_FLAG 0x4000
+extern unsigned short root_flags;
+extern unsigned short root_dev;
+extern unsigned short ram_flags;
+extern unsigned int sparc_ramdisk_image;
+extern unsigned int sparc_ramdisk_size;
+extern int root_mountflags;
+
+extern char initrd_end, initrd_start;
+
+/* Reboot the CPU = jump to beginning of flash again.
+ *
+ * Make sure that all function are inlined here.
+ */
+static void PROM_TEXT leon_reboot(char *bcommand)
+{
+	register char *arg = bcommand;
+	void __attribute__ ((noreturn)) (*reboot_physical) (char *cmd);
+
+	/* get physical address */
+	struct leon_prom_info *pspi =
+	    (void *)(CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	unsigned int *srmmu_ctx_table;
+
+	/* Turn of Interrupts */
+	set_pil(0xf);
+
+	/* Set kernel's context, context zero */
+	srmmu_set_context(0);
+
+	/* Get physical address of the MMU shutdown routine */
+	reboot_physical = (void *)
+	    SPARC_BYPASS_READ(&pspi->reloc_funcs.reboot_physical);
+
+	/* Now that we know the physical address of the function
+	 * we can make the MMU allow jumping to it.
+	 */
+	srmmu_ctx_table = (unsigned int *)srmmu_get_ctable_ptr();
+
+	srmmu_ctx_table = (unsigned int *)SPARC_BYPASS_READ(srmmu_ctx_table);
+
+	/* get physical address of kernel's context table (assume ptd) */
+	srmmu_ctx_table = (unsigned int *)
+	    (((unsigned int)srmmu_ctx_table & 0xfffffffc) << 4);
+
+	/* enable access to physical address of MMU shutdown function */
+	SPARC_BYPASS_WRITE(&srmmu_ctx_table
+			   [((unsigned int)reboot_physical) >> 24],
+			   (((unsigned int)reboot_physical & 0xff000000) >> 4) |
+			   0x1e);
+
+	/* flush TLB cache */
+	leon_flush_tlb_all();
+
+	/* flash instruction & data cache */
+	sparc_icache_flush_all();
+	sparc_dcache_flush_all();
+
+	/* jump to physical address function
+	 * so that when the MMU is disabled
+	 * we can continue to execute
+	 */
+	reboot_physical(arg);
+}
+
+static void PROM_TEXT leon_reboot_physical(char *bcommand)
+{
+	void __attribute__ ((noreturn)) (*reset) (void);
+
+	/* Turn off MMU */
+	srmmu_set_mmureg(0);
+
+	/* Hardcoded start address */
+	reset = CFG_MONITOR_BASE;
+
+	/* flush data cache */
+	sparc_dcache_flush_all();
+
+	/* flush instruction cache */
+	sparc_icache_flush_all();
+
+	/* Jump to start in Flash */
+	reset();
+}
+
+static void PROM_TEXT leon_halt(void)
+{
+	while (1) ;
+}
+
+/* get single char, don't care for blocking*/
+static int PROM_TEXT leon_nbgetchar(void)
+{
+	return -1;
+}
+
+/* put single char, don't care for blocking*/
+static int PROM_TEXT leon_nbputchar(int c)
+{
+	ambapp_dev_apbuart *uart;
+
+	/* get physical address */
+	struct leon_prom_info *pspi =
+	    (void *)(CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	uart = (ambapp_dev_apbuart *)
+	    SPARC_BYPASS_READ(&pspi->reloc_funcs.leon3_apbuart);
+
+	/* no UART? */
+	if (!uart)
+		return 0;
+
+	/***** put char in buffer... ***********
+	 * Make sure all functions are inline! *
+	 ***************************************/
+
+	/* Wait for last character to go. */
+	while (!(SPARC_BYPASS_READ(&uart->status)
+		 & LEON_REG_UART_STATUS_THE)) ;
+
+	/* Send data */
+	SPARC_BYPASS_WRITE(&uart->data, c);
+
+	/* Wait for data to be sent */
+	while (!(SPARC_BYPASS_READ(&uart->status)
+		 & LEON_REG_UART_STATUS_TSE)) ;
+
+	return 0;
+}
+
+/* node ops */
+
+/*#define nodes ((struct node *)__va(&pspi->nodes))*/
+#define nodes ((struct node *)(pspi->nodes))
+
+static int PROM_TEXT no_nextnode(int node)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi =
+	    (void *)(CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	if (nodes[node].level == nodes[node + 1].level)
+		return node + 1;
+	return -1;
+}
+
+static int PROM_TEXT no_child(int node)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	if (nodes[node].level == nodes[node + 1].level - 1)
+		return node + 1;
+	return -1;
+}
+
+static struct property PROM_TEXT *find_property(int node, char *name)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	struct property *prop = &nodes[node].properties[0];
+	while (prop && prop->name) {
+		if (pspi->reloc_funcs.strcmp(prop->name, name) == 0)
+			return prop;
+		prop++;
+	}
+	return NULL;
+}
+
+static int PROM_TEXT no_proplen(int node, char *name)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	struct property *prop = pspi->reloc_funcs.find_property(node, name);
+	if (prop)
+		return prop->length;
+	return -1;
+}
+
+static int PROM_TEXT no_getprop(int node, char *name, char *value)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	struct property *prop = pspi->reloc_funcs.find_property(node, name);
+	if (prop) {
+		pspi->reloc_funcs.memcpy(value, prop->value, prop->length);
+		return 1;
+	}
+	return -1;
+}
+
+static int PROM_TEXT no_setprop(int node, char *name, char *value, int len)
+{
+	return -1;
+}
+
+static char PROM_TEXT *no_nextprop(int node, char *name)
+{
+	/* get physical address */
+	struct leon_prom_info *pspi = (struct leon_prom_info *)
+	    (CFG_PROM_OFFSET + sizeof(srmmu_tables));
+	struct property *prop;
+
+	/* convert into virtual address */
+	pspi = (struct leon_prom_info *)
+	    (((unsigned int)pspi & 0x0fffffff) | PAGE_OFFSET);
+
+	if (!name || !name[0])
+		return nodes[node].properties[0].name;
+
+	prop = pspi->reloc_funcs.find_property(node, name);
+	if (prop)
+		return prop[1].name;
+	return NULL;
+}
+
+static int PROM_TEXT leon_strcmp(const char *s1, const char *s2)
+{
+	register char result;
+
+	while (1) {
+		result = *s1 - *s2;
+		if (result || !*s1)
+			break;
+		s2++;
+		s1++;
+	}
+
+	return result;
+}
+
+static void *PROM_TEXT leon_memcpy(void *dest, const void *src, size_t n)
+{
+	char *dst = (char *)dest, *source = (char *)src;
+
+	while (n--) {
+		*dst = *source;
+		dst++;
+		source++;
+	}
+	return dest;
+}
+
+#define GETREGSP(sp) __asm__ __volatile__("mov %%sp, %0" : "=r" (sp))
+
+void leon_prom_init(struct leon_prom_info *pspi)
+{
+	unsigned long i;
+	unsigned char cksum, *ptr;
+	char *addr_str, *end;
+	unsigned long sp;
+	GETREGSP(sp);
+
+	pspi->freq_khz = CONFIG_SYS_CLK_FREQ / 1000;
+
+	/* Set Available main memory size */
+	pspi->totphys.num_bytes = CFG_PROM_OFFSET - CFG_SDRAM_BASE;
+	pspi->avail.num_bytes = pspi->totphys.num_bytes;
+
+	/* Set the pointer to the Console UART in romvec */
+	pspi->reloc_funcs.leon3_apbuart = leon3_apbuart;
+
+	{
+		int j = 1;
+#ifdef CONFIG_SMP
+		ambapp_dev_irqmp *b;
+		b = (ambapp_dev_irqmp *) leon3_getapbbase(VENDOR_GAISLER,
+							  GAISLER_IRQMP);
+		if (b) {
+			j = 1 + ((LEON3_BYPASS_LOAD_PA(&(b->mpstatus))
+				  >> LEON3_IRQMPSTATUS_CPUNR) & 0xf);
+		}
+#endif
+#undef nodes
+		pspi->nodes[2 + j].level = -1;
+		pspi->nodes[2 + j].properties = __va(spi.root_properties + 3);
+	}
+
+	/* Set Ethernet MAC address from environment */
+	if ((addr_str = getenv("ethaddr")) != NULL) {
+		for (i = 0; i < 6; i++) {
+			pspi->idprom.id_ethaddr[i] = addr_str ?
+			    simple_strtoul(addr_str, &end, 16) : 0;
+			if (addr_str) {
+				addr_str = (*end) ? end + 1 : end;
+			}
+		}
+	} else {
+		/* HW Address not found in environment,
+		 * Set default HW address
+		 */
+		pspi->idprom.id_ethaddr[0] = 0;
+		pspi->idprom.id_ethaddr[1] = 0;
+		pspi->idprom.id_ethaddr[2] = 0;
+		pspi->idprom.id_ethaddr[3] = 0;
+		pspi->idprom.id_ethaddr[4] = 0;
+		pspi->idprom.id_ethaddr[5] = 0;
+	}
+
+	ptr = (unsigned char *)&pspi->idprom;
+	for (i = cksum = 0; i <= 0x0E; i++)
+		cksum ^= *ptr++;
+	pspi->idprom.id_cksum = cksum;
+}
+
+static inline void set_cache(unsigned long regval)
+{
+	asm volatile ("sta %0, [%%g0] %1\n\t":: "r" (regval), "i"(2):"memory");
+}
+
+extern unsigned short bss_start, bss_end;
+
+/* mark as section .img.main.text, to be referenced in linker script */
+int prom_init(void)
+{
+	struct leon_prom_info *pspi = (void *)
+	    ((((unsigned int)&spi) & PROM_SIZE_MASK) + CFG_PROM_OFFSET);
+
+	/* disable mmu */
+	srmmu_set_mmureg(0x00000000);
+	__asm__ __volatile__("flush\n\t");
+
+	/* init prom info struct */
+	leon_prom_init(pspi);
+
+	kernel_arg_promvec = &pspi->romvec;
+#ifdef PRINT_ROM_VEC
+	printf("Kernel rom vec: 0x%lx\n", (unsigned int)(&pspi->romvec));
+#endif
+	return 0;
+}
+
+/* Copy current kernel boot argument to ROMvec */
+void prepare_bootargs(char *bootargs)
+{
+	struct leon_prom_info *pspi;
+	char *src, *dst;
+	int left;
+
+	/* if no bootargs set, skip copying ==> default bootline */
+	if (bootargs && (*bootargs != '\0')) {
+		pspi = (void *)((((unsigned int)&spi) & PROM_SIZE_MASK) +
+				CFG_PROM_OFFSET);
+		src = bootargs;
+		dst = &pspi->arg[0];
+		left = 255;	/* max len */
+		while (*src && left > 0) {
+			*dst++ = *src++;
+			left--;
+		}
+		/* terminate kernel command line string */
+		*dst = 0;
+	}
+}
+
+void srmmu_init_cpu(unsigned int entry)
+{
+	sparc_srmmu_setup *psrmmu_tables = (void *)
+	    ((((unsigned int)&srmmu_tables) & PROM_SIZE_MASK) +
+	     CFG_PROM_OFFSET);
+
+	/* Make context 0 (kernel's context) point
+	 * to our prepared memory mapping
+	 */
+#define PTD 1
+	psrmmu_tables->ctx_table[0] =
+	    ((unsigned int)&psrmmu_tables->pgd_table[0x00]) >> 4 | PTD;
+
+	/* Set virtual kernel address 0xf0000000
+	 * to SRAM/SDRAM address.
+	 * Make it READ/WRITE/EXEC to SuperUser
+	 */
+#define PTE 2
+#define ACC_SU_ALL 0x1c
+	psrmmu_tables->pgd_table[0xf0] =
+	    (CFG_SDRAM_BASE >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf1] =
+	    ((CFG_SDRAM_BASE + 0x1000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf2] =
+	    ((CFG_SDRAM_BASE + 0x2000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf3] =
+	    ((CFG_SDRAM_BASE + 0x3000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf4] =
+	    ((CFG_SDRAM_BASE + 0x4000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf5] =
+	    ((CFG_SDRAM_BASE + 0x5000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf6] =
+	    ((CFG_SDRAM_BASE + 0x6000000) >> 4) | ACC_SU_ALL | PTE;
+	psrmmu_tables->pgd_table[0xf7] =
+	    ((CFG_SDRAM_BASE + 0x7000000) >> 4) | ACC_SU_ALL | PTE;
+
+	/* convert rom vec pointer to virtual address */
+	kernel_arg_promvec = (struct linux_romvec *)
+	    (((unsigned int)kernel_arg_promvec & 0x0fffffff) | 0xf0000000);
+
+	/* Set Context pointer to point to context table
+	 * 256 contexts supported.
+	 */
+	srmmu_set_ctable_ptr((unsigned int)&psrmmu_tables->ctx_table[0]);
+
+	/* Set kernel's context, context zero */
+	srmmu_set_context(0);
+
+	/* Invalidate all Cache */
+	__asm__ __volatile__("flush\n\t");
+
+	srmmu_set_mmureg(0x00000001);
+	leon_flush_tlb_all();
+	leon_flush_cache_all();
+}