2 * Unmaintained SGI Visual Workstation support.
3 * Split out from setup.c by davej@suse.de
6 #include <linux/interrupt.h>
7 #include <linux/module.h>
8 #include <linux/init.h>
11 #include <asm/visws/cobalt.h>
12 #include <asm/visws/piix4.h>
13 #include <asm/arch_hooks.h>
14 #include <asm/fixmap.h>
15 #include <asm/reboot.h>
16 #include <asm/setup.h>
23 #include "mach_apic.h"
25 #include <linux/init.h>
26 #include <linux/smp.h>
28 char visws_board_type = -1;
29 char visws_board_rev = -1;
31 int is_visws_box(void)
33 return visws_board_type >= 0;
36 static int __init visws_time_init_quirk(void)
38 printk(KERN_INFO "Starting Cobalt Timer system clock\n");
40 /* Set the countdown value */
41 co_cpu_write(CO_CPU_TIMEVAL, CO_TIME_HZ/HZ);
44 co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) | CO_CTRL_TIMERUN);
46 /* Enable (unmask) the timer interrupt */
47 co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) & ~CO_CTRL_TIMEMASK);
50 * Zero return means the generic timer setup code will set up
51 * the standard vector:
56 static int __init visws_pre_intr_init_quirk(void)
58 init_VISWS_APIC_irqs();
61 * We dont want ISA irqs to be set up by the generic code:
66 /* Quirk for machine specific memory setup. */
68 #define MB (1024 * 1024)
70 unsigned long sgivwfb_mem_phys;
71 unsigned long sgivwfb_mem_size;
72 EXPORT_SYMBOL(sgivwfb_mem_phys);
73 EXPORT_SYMBOL(sgivwfb_mem_size);
75 long long mem_size __initdata = 0;
77 static char * __init visws_memory_setup_quirk(void)
79 long long gfx_mem_size = 8 * MB;
81 mem_size = boot_params.alt_mem_k;
84 printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
89 * this hardcodes the graphics memory to 8 MB
90 * it really should be sized dynamically (or at least
91 * set as a boot param)
93 if (!sgivwfb_mem_size) {
94 printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
95 sgivwfb_mem_size = 8 * MB;
101 sgivwfb_mem_size &= ~((1 << 20) - 1);
102 sgivwfb_mem_phys = mem_size - gfx_mem_size;
104 e820_add_region(0, LOWMEMSIZE(), E820_RAM);
105 e820_add_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
106 e820_add_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);
111 static void visws_machine_emergency_restart(void)
114 * Visual Workstations restart after this
115 * register is poked on the PIIX4
117 outb(PIIX4_RESET_VAL, PIIX4_RESET_PORT);
120 static void visws_machine_power_off(void)
122 unsigned short pm_status;
123 /* extern unsigned int pci_bus0; */
125 while ((pm_status = inw(PMSTS_PORT)) & 0x100)
126 outw(pm_status, PMSTS_PORT);
128 outw(PM_SUSPEND_ENABLE, PMCNTRL_PORT);
132 #define PCI_CONF1_ADDRESS(bus, devfn, reg) \
133 (0x80000000 | (bus << 16) | (devfn << 8) | (reg & ~3))
135 /* outl(PCI_CONF1_ADDRESS(pci_bus0, SPECIAL_DEV, SPECIAL_REG), 0xCF8); */
136 outl(PIIX_SPECIAL_STOP, 0xCFC);
139 static int __init visws_get_smp_config_quirk(unsigned int early)
142 * Prevent MP-table parsing by the generic code:
147 extern unsigned int __cpuinitdata maxcpus;
150 * The Visual Workstation is Intel MP compliant in the hardware
151 * sense, but it doesn't have a BIOS(-configuration table).
152 * No problem for Linux.
155 static void __init MP_processor_info (struct mpc_config_processor *m)
157 int ver, logical_apicid;
158 physid_mask_t apic_cpus;
160 if (!(m->mpc_cpuflag & CPU_ENABLED))
163 logical_apicid = m->mpc_apicid;
164 printk(KERN_INFO "%sCPU #%d %u:%u APIC version %d\n",
165 m->mpc_cpuflag & CPU_BOOTPROCESSOR ? "Bootup " : "",
167 (m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
168 (m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
171 if (m->mpc_cpuflag & CPU_BOOTPROCESSOR)
172 boot_cpu_physical_apicid = m->mpc_apicid;
174 ver = m->mpc_apicver;
175 if ((ver >= 0x14 && m->mpc_apicid >= 0xff) || m->mpc_apicid >= 0xf) {
176 printk(KERN_ERR "Processor #%d INVALID. (Max ID: %d).\n",
177 m->mpc_apicid, MAX_APICS);
181 apic_cpus = apicid_to_cpu_present(m->mpc_apicid);
182 physids_or(phys_cpu_present_map, phys_cpu_present_map, apic_cpus);
187 printk(KERN_ERR "BIOS bug, APIC version is 0 for CPU#%d! "
188 "fixing up to 0x10. (tell your hw vendor)\n",
192 apic_version[m->mpc_apicid] = ver;
195 int __init visws_find_smp_config_quirk(unsigned int reserve)
197 struct mpc_config_processor *mp = phys_to_virt(CO_CPU_TAB_PHYS);
198 unsigned short ncpus = readw(phys_to_virt(CO_CPU_NUM_PHYS));
200 if (ncpus > CO_CPU_MAX) {
201 printk(KERN_WARNING "find_visws_smp: got cpu count of %d at %p\n",
210 #ifdef CONFIG_X86_LOCAL_APIC
211 smp_found_config = 1;
214 MP_processor_info(mp++);
216 mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
221 extern int visws_trap_init_quirk(void);
223 void __init visws_early_detect(void)
227 visws_board_type = (char)(inb_p(PIIX_GPI_BD_REG) & PIIX_GPI_BD_REG)
228 >> PIIX_GPI_BD_SHIFT;
230 if (visws_board_type < 0)
234 * Install special quirks for timer, interrupt and memory setup:
236 arch_time_init_quirk = visws_time_init_quirk;
237 arch_pre_intr_init_quirk = visws_pre_intr_init_quirk;
238 arch_memory_setup_quirk = visws_memory_setup_quirk;
241 * Fall back to generic behavior for traps:
243 arch_intr_init_quirk = NULL;
244 arch_trap_init_quirk = visws_trap_init_quirk;
247 * Install reboot quirks:
249 pm_power_off = visws_machine_power_off;
250 machine_ops.emergency_restart = visws_machine_emergency_restart;
253 * Do not use broadcast IPIs:
258 * Override generic MP-table parsing:
260 mach_get_smp_config_quirk = visws_get_smp_config_quirk;
261 mach_find_smp_config_quirk = visws_find_smp_config_quirk;
263 #ifdef CONFIG_X86_IO_APIC
265 * Turn off IO-APIC detection and initialization:
267 skip_ioapic_setup = 1;
272 * First, we have to initialize the 307 part to allow us access
273 * to the GPIO registers. Let's map them at 0x0fc0 which is right
274 * after the PIIX4 PM section.
276 outb_p(SIO_DEV_SEL, SIO_INDEX);
277 outb_p(SIO_GP_DEV, SIO_DATA); /* Talk to GPIO regs. */
279 outb_p(SIO_DEV_MSB, SIO_INDEX);
280 outb_p(SIO_GP_MSB, SIO_DATA); /* MSB of GPIO base address */
282 outb_p(SIO_DEV_LSB, SIO_INDEX);
283 outb_p(SIO_GP_LSB, SIO_DATA); /* LSB of GPIO base address */
285 outb_p(SIO_DEV_ENB, SIO_INDEX);
286 outb_p(1, SIO_DATA); /* Enable GPIO registers. */
289 * Now, we have to map the power management section to write
290 * a bit which enables access to the GPIO registers.
291 * What lunatic came up with this shit?
293 outb_p(SIO_DEV_SEL, SIO_INDEX);
294 outb_p(SIO_PM_DEV, SIO_DATA); /* Talk to GPIO regs. */
296 outb_p(SIO_DEV_MSB, SIO_INDEX);
297 outb_p(SIO_PM_MSB, SIO_DATA); /* MSB of PM base address */
299 outb_p(SIO_DEV_LSB, SIO_INDEX);
300 outb_p(SIO_PM_LSB, SIO_DATA); /* LSB of PM base address */
302 outb_p(SIO_DEV_ENB, SIO_INDEX);
303 outb_p(1, SIO_DATA); /* Enable PM registers. */
306 * Now, write the PM register which enables the GPIO registers.
308 outb_p(SIO_PM_FER2, SIO_PM_INDEX);
309 outb_p(SIO_PM_GP_EN, SIO_PM_DATA);
312 * Now, initialize the GPIO registers.
313 * We want them all to be inputs which is the
314 * power on default, so let's leave them alone.
315 * So, let's just read the board rev!
317 raw = inb_p(SIO_GP_DATA1);
318 raw &= 0x7f; /* 7 bits of valid board revision ID. */
320 if (visws_board_type == VISWS_320) {
323 } else if (raw < 0xc) {
328 } else if (visws_board_type == VISWS_540) {
331 visws_board_rev = raw;
334 printk(KERN_INFO "Silicon Graphics Visual Workstation %s (rev %d) detected\n",
335 (visws_board_type == VISWS_320 ? "320" :
336 (visws_board_type == VISWS_540 ? "540" :
337 "unknown")), visws_board_rev);