home *** CD-ROM | disk | FTP | other *** search
- /* probe.c: Preliminary device tree probing routines...
-
- Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- */
-
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <asm/vac-ops.h>
- #include <asm/io.h>
- #include <asm/vaddrs.h>
- #include <asm/param.h>
- #include <asm/clock.h>
- #include <asm/system.h>
-
- /* #define DEBUG_PROBING */
-
- char promstr_buf[64]; /* overkill */
- unsigned int promint_buf[1];
-
- extern int prom_node_root;
- extern int num_segmaps, num_contexts;
-
- extern int node_get_sibling(int node);
- extern int node_get_child(int node);
- extern char* get_str_from_prom(int node, char* name, char* value);
- extern unsigned int* get_int_from_prom(int node, char* name, unsigned int *value);
-
- int first_descent;
-
- /* Cpu-type information and manufacturer strings */
-
-
- struct cpu_iu_info {
- int psr_impl;
- int psr_vers;
- char* cpu_name; /* should be enough I hope... */
- };
-
- struct cpu_fp_info {
- int psr_impl;
- int fp_vers;
- char* fp_name;
- };
-
- struct cpu_fp_info linux_sparc_fpu[] = {
- { 0, 0, "Fujitsu MB86910 or Weitek WTL1164/5"},
- { 0, 1, "Fujitsu MB86911 or Weitek WTL1164/5"},
- { 0, 2, "LSI Logic L64802 or Texas Instruments ACT8847"},
- { 0, 3, "Weitek WTL3170/2"},
- { 0, 4, "Lsi Logic/Meiko L64804"},
- { 0, 5, "reserved"},
- { 0, 6, "reserved"},
- { 0, 7, "No FPU"},
- { 1, 0, "Lsi Logic L64812 or Texas Instruments ACT8847"},
- { 1, 1, "Lsi Logic L64814"},
- { 1, 2, "Texas Instruments TMS390-C602A"},
- { 1, 3, "Weitek WTL3171"},
- { 1, 4, "reserved"},
- { 1, 5, "reserved"},
- { 1, 6, "reserved"},
- { 1, 7, "No FPU"},
- { 2, 0, "BIT B5010 or B5110/20 or B5210"},
- { 2, 1, "reserved"},
- { 2, 2, "reserved"},
- { 2, 3, "reserved"},
- { 2, 4, "reserved"},
- { 2, 5, "reserved"},
- { 2, 6, "reserved"},
- { 2, 7, "No FPU"},
- { 5, 0, "Matsushita MN10501"},
- { 5, 1, "reserved"},
- { 5, 2, "reserved"},
- { 5, 3, "reserved"},
- { 5, 4, "reserved"},
- { 5, 5, "reserved"},
- { 5, 6, "reserved"},
- { 5, 7, "No FPU"},
- };
-
- struct cpu_iu_info linux_sparc_chips[] = {
- { 0, 0, "Fujitsu Microelectronics, Inc. - MB86900/1A"},
- { 1, 0, "Cypress CY7C601"},
- { 1, 1, "LSI Logic Corporation - L64811"},
- { 1, 3, "Cypress CY7C611"},
- { 2, 0, "Bipolar Integrated Technology - B5010"},
- { 3, 0, "LSI Logic Corporation - unknown-type"},
- { 4, 0, "Texas Instruments, Inc. - unknown"},
- { 4, 1, "Texas Instruments, Inc. - Sparc Classic"},
- { 4, 2, "Texas Instruments, Inc. - unknown"},
- { 4, 3, "Texas Instruments, Inc. - unknown"},
- { 4, 4, "Texas Instruments, Inc. - unknown"},
- { 4, 5, "Texas Instruments, Inc. - unknown"},
- { 5, 0, "Matsushita - MN10501"},
- { 6, 0, "Philips Corporation - unknown"},
- { 7, 0, "Harvest VLSI Design Center, Inc. - unknown"},
- { 8, 0, "Systems and Processes Engineering Corporation (SPEC)"},
- { 9, 0, "UNKNOWN CPU-VENDOR/TYPE"},
- { 0xa, 0, "UNKNOWN CPU-VENDOR/TYPE"},
- { 0xb, 0, "UNKNOWN CPU-VENDOR/TYPE"},
- { 0xc, 0, "UNKNOWN CPU-VENDOR/TYPE"},
- { 0xd, 0, "UNKNOWN CPU-VENDOR/TYPE"},
- { 0xe, 0, "UNKNOWN CPU-VENDOR/TYPE"},
- { 0xf, 0, "UNKNOWN CPU-VENDOR/TYPE"},
- };
-
- char *sparc_cpu_type = "cpu-oops";
- char *sparc_fpu_type = "fpu-oops";
-
- /* various Virtual Address Cache parameters we find at boot time... */
-
- extern int vac_size, vac_linesize, vac_do_hw_vac_flushes;
- extern int vac_entries_per_context, vac_entries_per_segment;
- extern int vac_entries_per_page;
-
- extern int find_vac_size(void);
- extern int find_vac_linesize(void);
- extern int find_vac_hwflushes(void);
- extern void find_mmu_num_segmaps(void);
- extern void find_mmu_num_contexts(void);
-
- void
- probe_cpu(void)
- {
- register int psr_impl=0;
- register int psr_vers = 0;
- register int fpu_vers = 0;
- register int i = 0;
- unsigned int tmp_fsr;
-
- &tmp_fsr; /* GCC grrr... */
-
- __asm__("rd %%psr, %0\n\t"
- "mov %0, %1\n\t"
- "srl %0, 28, %0\n\t"
- "srl %1, 24, %1\n\t"
- "and %0, 0xf, %0\n\t"
- "and %1, 0xf, %1\n\t" :
- "=r" (psr_impl),
- "=r" (psr_vers) :
- "0" (psr_impl),
- "1" (psr_vers));
-
-
- __asm__("st %%fsr, %1\n\t"
- "ld %1, %0\n\t"
- "srl %0, 17, %0\n\t"
- "and %0, 0x7, %0\n\t" :
- "=r" (fpu_vers),
- "=m" (tmp_fsr) :
- "0" (fpu_vers),
- "1" (tmp_fsr));
-
- printk("fpu_vers: %d ", fpu_vers);
- printk("psr_impl: %d ", psr_impl);
- printk("psr_vers: %d \n\n", psr_vers);
-
- for(i = 0; i<23; i++)
- {
- if(linux_sparc_chips[i].psr_impl == psr_impl)
- if(linux_sparc_chips[i].psr_vers == psr_vers)
- {
- sparc_cpu_type = linux_sparc_chips[i].cpu_name;
- break;
- }
- }
-
- if(i==23)
- {
- printk("No CPU type! You lose\n");
- printk("DEBUG: psr.impl = 0x%x psr.vers = 0x%x\n", psr_impl,
- psr_vers);
- return;
- }
-
- for(i = 0; i<32; i++)
- {
- if(linux_sparc_fpu[i].psr_impl == psr_impl)
- if(linux_sparc_fpu[i].fp_vers == fpu_vers)
- {
- sparc_fpu_type = linux_sparc_fpu[i].fp_name;
- break;
- }
- }
-
- if(i == 32)
- {
- printk("No FPU type! You don't completely lose though...\n");
- printk("DEBUG: psr.impl = 0x%x fsr.vers = 0x%x\n", psr_impl, fpu_vers);
- sparc_fpu_type = linux_sparc_fpu[31].fp_name;
- }
-
- printk("CPU: %s \n", sparc_cpu_type);
- printk("FPU: %s \n", sparc_fpu_type);
-
- return;
- }
-
- void
- probe_vac(void)
- {
- register unsigned int x,y;
-
- #ifndef CONFIG_SRMMU
- vac_size = find_vac_size();
- vac_linesize = find_vac_linesize();
- vac_do_hw_vac_flushes = find_vac_hwflushes();
-
- /* Calculate various constants that make the cache-flushing code
- * mode speedy.
- */
-
- vac_entries_per_segment = vac_entries_per_context = vac_size >> 12;
-
- for(x=0,y=vac_linesize; ((1<<x)<y); x++);
- if((1<<x) != vac_linesize) printk("Warning BOGUS VAC linesize 0x%x",
- vac_size);
-
- vac_entries_per_page = x;
-
- printk("Sparc VAC cache: Size=%d bytes Line-Size=%d bytes ... ", vac_size,
- vac_linesize);
-
- /* Here we want to 'invalidate' all the software VAC "tags"
- * just in case there is garbage in there. Then we enable it.
- */
-
- for(x=0x80000000, y=(x+vac_size); x<y; x+=vac_linesize)
- __asm__("sta %0, [%1] %2" : : "r" (0), "r" (x), "n" (0x2));
-
- x=enable_vac();
- printk("ENABLED\n");
- #endif
-
- return;
- }
-
- void
- probe_mmu(void)
- {
- find_mmu_num_segmaps();
- find_mmu_num_contexts();
-
- printk("MMU segmaps: %d MMU contexts: %d\n", num_segmaps,
- num_contexts);
-
- return;
- }
-
- void
- probe_clock(int fchild)
- {
- register int node, type;
- register char *node_str;
-
- /* This will basically traverse the node-tree of the prom to see
- * which timer chip is on this machine.
- */
-
- printk("Probing timer chip... ");
-
- type = 0;
- for(node = fchild ; ; )
- {
- node_str = get_str_from_prom(node, "model", promstr_buf);
- if(strcmp(node_str, "mk48t02") == 0)
- {
- type = 2;
- break;
- }
-
- if(strcmp(node_str, "mk48t08") == 0)
- {
- type = 8;
- break;
- }
-
- node = node_get_sibling(node);
- if(node == fchild)
- {
- printk("Aieee, could not find timer chip type\n");
- return;
- }
- }
-
- printk("Mostek %s\n", node_str);
- printk("At OBIO address: 0x%x Virtual address: 0x%x\n",
- (unsigned int) TIMER_PHYSADDR, (unsigned int) TIMER_STRUCT);
-
- mapioaddr((unsigned long) TIMER_PHYSADDR,
- (unsigned long) TIMER_STRUCT);
-
- TIMER_STRUCT->timer_limit14=(((1000000/HZ) << 10) | 0x80000000);
-
- return;
- }
-
-
- void
- probe_esp(register int esp_node)
- {
- register int nd;
- register char* lbuf;
-
- nd = node_get_child(esp_node);
-
- printk("\nProbing ESP:\n");
- lbuf = get_str_from_prom(nd, "name", promstr_buf);
-
- if(*get_int_from_prom(nd, "name", promint_buf) != 0)
- printk("Node: 0x%x Name: %s\n", nd, lbuf);
-
- while((nd = node_get_sibling(nd)) != 0) {
- lbuf = get_str_from_prom(nd, "name", promstr_buf);
- printk("Node: 0x%x Name: %s\n", nd, lbuf);
- }
-
- printk("\n");
-
- return;
- }
-
- void
- probe_sbus(register int cpu_child_node)
- {
- register int nd, savend;
- register char* lbuf;
-
- nd = cpu_child_node;
-
- lbuf = (char *) 0;
-
- while((nd = node_get_sibling(nd)) != 0) {
- lbuf = get_str_from_prom(nd, "name", promstr_buf);
- if(strcmp(lbuf, "sbus") == 0)
- break;
- };
-
- nd = node_get_child(nd);
-
- printk("Node: 0x%x Name: %s\n", nd,
- get_str_from_prom(nd, "name", promstr_buf));
-
- if(strcmp(lbuf, "esp") == 0) {
- probe_esp(nd);
- };
-
- while((nd = node_get_sibling(nd)) != 0) {
- printk("Node: 0x%x Name: %s\n", nd,
- lbuf = get_str_from_prom(nd, "name", promstr_buf));
-
- if(strcmp(lbuf, "esp") == 0) {
- savend = nd;
- probe_esp(nd);
- nd = savend;
- };
- };
-
- printk("\n");
- return;
- }
-
- extern unsigned long probe_memory(void);
- extern struct sparc_phys_banks sp_banks[14];
- unsigned int phys_bytes_of_ram, end_of_phys_memory;
-
- void
- probe_devices(void)
- {
- register int nd, i;
- register char* str;
-
- nd = prom_node_root;
-
- printk("PROBING DEVICES:\n");
-
- str = get_str_from_prom(nd, "device_type", promstr_buf);
- if(strcmp(str, "cpu") == 0) {
- printk("Found CPU root prom device tree node.\n");
- } else {
- printk("Root node in device tree was not 'cpu' cannot continue.\n");
- halt();
- };
-
- #ifdef DEBUG_PROBING
- printk("String address for d_type: 0x%x\n", (unsigned int) str);
- printk("str[0] = %c str[1] = %c str[2] = %c \n", str[0], str[1], str[2]);
- #endif
-
- str = get_str_from_prom(nd, "name", promstr_buf);
-
- #ifdef DEBUG_PROBING
- printk("String address for name: 0x%x\n", (unsigned int) str);
- printk("str[0] = %c str[1] = %c str[2] = %c \n", str[0], str[1], str[2]);
- #endif
-
- printk("Name: %s \n", str);
-
- first_descent = nd = node_get_child(nd);
-
-
- /* Ok, here will go a call to each specific device probe. We can
- * call these now that we have the 'root' node and the child of
- * this node to send to the routines. ORDER IS IMPORTANT!
- */
-
- probe_cpu();
- probe_vac();
- probe_mmu();
- phys_bytes_of_ram = probe_memory();
-
- printk("Physical Memory: %d bytes\n", (int) phys_bytes_of_ram);
- for(i=0; sp_banks[i].num_bytes != 0; i++) {
- printk("Bank %d: base 0x%x bytes %d\n", i,
- (unsigned int) sp_banks[i].base_addr,
- (int) sp_banks[i].num_bytes);
- end_of_phys_memory = sp_banks[i].base_addr + sp_banks[i].num_bytes;
- }
-
- printk("PROM Root Child Node: 0x%x Name: %s \n", nd,
- get_str_from_prom(nd, "name", promstr_buf));
-
- while((nd = node_get_sibling(nd)) != 0) {
- printk("Node: 0x%x Name: %s", nd,
- get_str_from_prom(nd, "name", promstr_buf));
- printk("\n");
- };
-
- printk("\nProbing SBUS:\n");
- probe_sbus(first_descent);
-
- return;
- }
-