diff options
Diffstat (limited to 'cpu/leon3/prom.c')
-rw-r--r-- | cpu/leon3/prom.c | 1078 |
1 files changed, 1078 insertions, 0 deletions
diff --git a/cpu/leon3/prom.c b/cpu/leon3/prom.c new file mode 100644 index 0000000..9fa2d04 --- /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(); +} |