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powerpc: Run on old powermacs.
Old powermacs have a number of differences from current machines: - there is no interrupt tree in the device tree, just interrupt or AAPL,interrupt properties - the chosen node in the device tree is called /chosen@0 - the OF claim method doesn't map the memory, so we have to do an explicit map call as well - there is no /chosen/cpu property on SMP machines - the NVRAM isn't structured as a set of partitions. This adapts the merged powermac support code to cope with these issues. Signed-off-by: Paul Mackerras <paulus@samba.org>
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96c4450760
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@ -309,6 +309,37 @@ static int __devinit finish_node_interrupts(struct device_node *np,
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unsigned int *irq, virq;
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struct device_node *ic;
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if (num_interrupt_controllers == 0) {
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/*
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* Old machines just have a list of interrupt numbers
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* and no interrupt-controller nodes.
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*/
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ints = (unsigned int *) get_property(np, "AAPL,interrupts",
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&intlen);
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/* XXX old interpret_pci_props looked in parent too */
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/* XXX old interpret_macio_props looked for interrupts
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before AAPL,interrupts */
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if (ints == NULL)
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ints = (unsigned int *) get_property(np, "interrupts",
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&intlen);
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if (ints == NULL)
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return 0;
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np->n_intrs = intlen / sizeof(unsigned int);
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np->intrs = prom_alloc(np->n_intrs * sizeof(np->intrs[0]),
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mem_start);
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if (!np->intrs)
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return -ENOMEM;
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if (measure_only)
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return 0;
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for (i = 0; i < np->n_intrs; ++i) {
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np->intrs[i].line = *ints++;
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np->intrs[i].sense = 1;
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}
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return 0;
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}
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ints = (unsigned int *) get_property(np, "interrupts", &intlen);
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if (ints == NULL)
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return 0;
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@ -1024,6 +1055,8 @@ void __init unflatten_device_tree(void)
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/* Get pointer to OF "/chosen" node for use everywhere */
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of_chosen = of_find_node_by_path("/chosen");
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if (of_chosen == NULL)
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of_chosen = of_find_node_by_path("/chosen@0");
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/* Retreive command line */
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if (of_chosen != NULL) {
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@ -1123,7 +1156,8 @@ static int __init early_init_dt_scan_chosen(unsigned long node,
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DBG("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
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if (depth != 1 || strcmp(uname, "chosen") != 0)
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if (depth != 1 ||
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(strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
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return 0;
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/* get platform type */
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@ -132,6 +132,7 @@ struct prom_t {
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ihandle chosen;
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int cpu;
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ihandle stdout;
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ihandle mmumap;
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};
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struct mem_map_entry {
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@ -274,14 +275,6 @@ static int __init call_prom_ret(const char *service, int nargs, int nret,
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}
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static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
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unsigned long align)
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{
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return (unsigned int)call_prom("claim", 3, 1,
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(prom_arg_t)virt, (prom_arg_t)size,
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(prom_arg_t)align);
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}
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static void __init prom_print(const char *msg)
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{
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const char *p, *q;
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@ -363,6 +356,21 @@ static void __init prom_printf(const char *format, ...)
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}
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static unsigned int __init prom_claim(unsigned long virt, unsigned long size,
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unsigned long align)
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{
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int ret;
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struct prom_t *_prom = &RELOC(prom);
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ret = call_prom("claim", 3, 1, (prom_arg_t)virt, (prom_arg_t)size,
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(prom_arg_t)align);
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if (ret != -1 && _prom->mmumap != 0)
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/* old pmacs need us to map as well */
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call_prom("call-method", 6, 1,
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ADDR("map"), _prom->mmumap, 0, size, virt, virt);
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return ret;
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}
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static void __init __attribute__((noreturn)) prom_panic(const char *reason)
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{
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#ifdef CONFIG_PPC64
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@ -1323,8 +1331,38 @@ static void __init prom_init_client_services(unsigned long pp)
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_prom->root = call_prom("finddevice", 1, 1, ADDR("/"));
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if (!PHANDLE_VALID(_prom->root))
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prom_panic("cannot find device tree root"); /* msg won't be printed :( */
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_prom->mmumap = 0;
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}
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#ifdef CONFIG_PPC32
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/*
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* For really old powermacs, we need to map things we claim.
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* For that, we need the ihandle of the mmu.
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*/
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static void __init prom_find_mmu(void)
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{
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struct prom_t *_prom = &RELOC(prom);
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phandle oprom;
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char version[64];
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oprom = call_prom("finddevice", 1, 1, ADDR("/openprom"));
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if (!PHANDLE_VALID(oprom))
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return;
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if (prom_getprop(oprom, "model", version, sizeof(version)) <= 0)
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return;
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version[sizeof(version) - 1] = 0;
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prom_printf("OF version is '%s'\n", version);
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/* XXX might need to add other versions here */
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if (strcmp(version, "Open Firmware, 1.0.5") != 0)
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return;
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prom_getprop(_prom->chosen, "mmu", &_prom->mmumap,
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sizeof(_prom->mmumap));
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}
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#else
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#define prom_find_mmu()
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#endif
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static void __init prom_init_stdout(void)
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{
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struct prom_t *_prom = &RELOC(prom);
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@ -1379,7 +1417,7 @@ static int __init prom_find_machine_type(void)
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if (sl == 0)
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break;
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if (strstr(p, RELOC("Power Macintosh")) ||
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strstr(p, RELOC("MacRISC4")))
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strstr(p, RELOC("MacRISC")))
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return PLATFORM_POWERMAC;
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#ifdef CONFIG_PPC64
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if (strstr(p, RELOC("Momentum,Maple")))
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@ -1618,22 +1656,17 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
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namep[l] = '\0';
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/* Fixup an Apple bug where they have bogus \0 chars in the
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* middle of the path in some properties
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* middle of the path in some properties, and extract
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* the unit name (everything after the last '/').
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*/
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for (p = namep, ep = namep + l; p < ep; p++)
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if (*p == '\0') {
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memmove(p, p+1, ep - p);
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ep--; l--; p--;
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}
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/* now try to extract the unit name in that mess */
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for (p = namep, lp = NULL; *p; p++)
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for (lp = p = namep, ep = namep + l; p < ep; p++) {
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if (*p == '/')
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lp = p + 1;
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if (lp != NULL)
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memmove(namep, lp, strlen(lp) + 1);
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*mem_start = _ALIGN(((unsigned long) namep) +
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strlen(namep) + 1, 4);
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lp = namep;
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else if (*p != 0)
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*lp++ = *p;
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}
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*lp = 0;
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*mem_start = _ALIGN((unsigned long)lp + 1, 4);
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}
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/* get it again for debugging */
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@ -1858,8 +1891,9 @@ static void __init prom_find_boot_cpu(void)
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ihandle prom_cpu;
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phandle cpu_pkg;
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_prom->cpu = 0;
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if (prom_getprop(_prom->chosen, "cpu", &prom_cpu, sizeof(prom_cpu)) <= 0)
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prom_panic("cannot find boot cpu");
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return;
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cpu_pkg = call_prom("instance-to-package", 1, 1, prom_cpu);
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@ -1933,6 +1967,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
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*/
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prom_init_stdout();
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/*
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* See if this OF is old enough that we need to do explicit maps
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*/
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prom_find_mmu();
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/*
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* Check for an initrd
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*/
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@ -225,7 +225,7 @@ int find_via_pmu(void)
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return 0;
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printk("WARNING ! Your machine is PMU-based but your kernel\n");
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printk(" wasn't compiled with CONFIG_ADB_PMU option !\n");
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return;
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return 0;
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}
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#endif
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@ -293,7 +293,7 @@ static void __init l2cr_init(void)
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void __init pmac_setup_arch(void)
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{
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struct device_node *cpu;
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struct device_node *cpu, *ic;
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int *fp;
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unsigned long pvr;
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@ -319,6 +319,12 @@ void __init pmac_setup_arch(void)
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of_node_put(cpu);
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}
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/* See if newworld or oldworld */
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ic = of_find_node_by_name(NULL, "interrupt-controller");
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pmac_newworld = (ic != NULL);
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if (ic)
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of_node_put(ic);
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/* Lookup PCI hosts */
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pmac_pci_init();
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