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-rw-r--r--cpu/leon2/prom.c1047
1 files changed, 1047 insertions, 0 deletions
diff --git a/cpu/leon2/prom.c b/cpu/leon2/prom.c
new file mode 100644
index 0000000000..b03199577f
--- /dev/null
+++ b/cpu/leon2/prom.c
@@ -0,0 +1,1047 @@
+/* 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 <config.h>
+/*
+#define PRINT_ROM_VEC
+*/
+extern struct linux_romvec *kernel_arg_promvec;
+
+#define PROM_PGT __attribute__ ((__section__ (".prom.pgt")))
+#define PROM_TEXT __attribute__ ((__section__ (".prom.text")))
+#define PROM_DATA __attribute__ ((__section__ (".prom.data")))
+
+/* 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);
+};
+
+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)
+{
+ LEON2_regs *leon2 = (LEON2_regs *) LEON2_PREGS;
+
+ /***** put char in buffer... ***********
+ * Make sure all functions are inline! *
+ ***************************************/
+
+ /* Wait for last character to go. */
+ while (!(SPARC_BYPASS_READ(&leon2->UART_Status_1)
+ & LEON2_UART_STAT_THE)) ;
+
+ /* Send data */
+ SPARC_BYPASS_WRITE(&leon2->UART_Channel_1, c);
+
+ /* Wait for data to be sent */
+ while (!(SPARC_BYPASS_READ(&leon2->UART_Status_1)
+ & LEON2_UART_STAT_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;
+
+#undef nodes
+ pspi->nodes[3].level = -1;
+ pspi->nodes[3].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();
+}
generated by cgit (git 2.34.1) at 2024-12-29 09:51:40 +0000