2 * Unmaintained SGI Visual Workstation support.
3 * Split out from setup.c by davej@suse.de
7 #include <linux/init.h>
8 #include <linux/interrupt.h>
9 #include <linux/module.h>
11 #include <asm/fixmap.h>
12 #include <asm/arch_hooks.h>
15 #include <asm/setup.h>
21 char visws_board_type = -1;
22 char visws_board_rev = -1;
24 void __init visws_get_board_type_and_rev(void)
28 visws_board_type = (char)(inb_p(PIIX_GPI_BD_REG) & PIIX_GPI_BD_REG)
32 * First, we have to initialize the 307 part to allow us access
33 * to the GPIO registers. Let's map them at 0x0fc0 which is right
34 * after the PIIX4 PM section.
36 outb_p(SIO_DEV_SEL, SIO_INDEX);
37 outb_p(SIO_GP_DEV, SIO_DATA); /* Talk to GPIO regs. */
39 outb_p(SIO_DEV_MSB, SIO_INDEX);
40 outb_p(SIO_GP_MSB, SIO_DATA); /* MSB of GPIO base address */
42 outb_p(SIO_DEV_LSB, SIO_INDEX);
43 outb_p(SIO_GP_LSB, SIO_DATA); /* LSB of GPIO base address */
45 outb_p(SIO_DEV_ENB, SIO_INDEX);
46 outb_p(1, SIO_DATA); /* Enable GPIO registers. */
49 * Now, we have to map the power management section to write
50 * a bit which enables access to the GPIO registers.
51 * What lunatic came up with this shit?
53 outb_p(SIO_DEV_SEL, SIO_INDEX);
54 outb_p(SIO_PM_DEV, SIO_DATA); /* Talk to GPIO regs. */
56 outb_p(SIO_DEV_MSB, SIO_INDEX);
57 outb_p(SIO_PM_MSB, SIO_DATA); /* MSB of PM base address */
59 outb_p(SIO_DEV_LSB, SIO_INDEX);
60 outb_p(SIO_PM_LSB, SIO_DATA); /* LSB of PM base address */
62 outb_p(SIO_DEV_ENB, SIO_INDEX);
63 outb_p(1, SIO_DATA); /* Enable PM registers. */
66 * Now, write the PM register which enables the GPIO registers.
68 outb_p(SIO_PM_FER2, SIO_PM_INDEX);
69 outb_p(SIO_PM_GP_EN, SIO_PM_DATA);
72 * Now, initialize the GPIO registers.
73 * We want them all to be inputs which is the
74 * power on default, so let's leave them alone.
75 * So, let's just read the board rev!
77 raw = inb_p(SIO_GP_DATA1);
78 raw &= 0x7f; /* 7 bits of valid board revision ID. */
80 if (visws_board_type == VISWS_320) {
83 } else if (raw < 0xc) {
88 } else if (visws_board_type == VISWS_540) {
91 visws_board_rev = raw;
94 printk(KERN_INFO "Silicon Graphics Visual Workstation %s (rev %d) detected\n",
95 (visws_board_type == VISWS_320 ? "320" :
96 (visws_board_type == VISWS_540 ? "540" :
97 "unknown")), visws_board_rev);
100 void __init pre_intr_init_hook(void)
102 init_VISWS_APIC_irqs();
105 void __init intr_init_hook(void)
107 #ifdef CONFIG_X86_LOCAL_APIC
112 void __init pre_setup_arch_hook()
114 visws_get_board_type_and_rev();
117 static struct irqaction irq0 = {
118 .handler = timer_interrupt,
119 .flags = IRQF_DISABLED | IRQF_IRQPOLL,
123 void __init time_init_hook(void)
125 printk(KERN_INFO "Starting Cobalt Timer system clock\n");
127 /* Set the countdown value */
128 co_cpu_write(CO_CPU_TIMEVAL, CO_TIME_HZ/HZ);
130 /* Start the timer */
131 co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) | CO_CTRL_TIMERUN);
133 /* Enable (unmask) the timer interrupt */
134 co_cpu_write(CO_CPU_CTRL, co_cpu_read(CO_CPU_CTRL) & ~CO_CTRL_TIMEMASK);
136 /* Wire cpu IDT entry to s/w handler (and Cobalt APIC to IDT) */
140 /* Hook for machine specific memory setup. */
142 #define MB (1024 * 1024)
144 unsigned long sgivwfb_mem_phys;
145 unsigned long sgivwfb_mem_size;
146 EXPORT_SYMBOL(sgivwfb_mem_phys);
147 EXPORT_SYMBOL(sgivwfb_mem_size);
149 long long mem_size __initdata = 0;
151 char * __init machine_specific_memory_setup(void)
153 long long gfx_mem_size = 8 * MB;
155 mem_size = boot_params.alt_mem_k;
158 printk(KERN_WARNING "Bootloader didn't set memory size, upgrade it !\n");
163 * this hardcodes the graphics memory to 8 MB
164 * it really should be sized dynamically (or at least
165 * set as a boot param)
167 if (!sgivwfb_mem_size) {
168 printk(KERN_WARNING "Defaulting to 8 MB framebuffer size\n");
169 sgivwfb_mem_size = 8 * MB;
175 sgivwfb_mem_size &= ~((1 << 20) - 1);
176 sgivwfb_mem_phys = mem_size - gfx_mem_size;
178 add_memory_region(0, LOWMEMSIZE(), E820_RAM);
179 add_memory_region(HIGH_MEMORY, mem_size - sgivwfb_mem_size - HIGH_MEMORY, E820_RAM);
180 add_memory_region(sgivwfb_mem_phys, sgivwfb_mem_size, E820_RESERVED);