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
);
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