| 1 | |
| 2 | |
| 3 | * linux/arch/alpha/kernel/console.c
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| 4 | *
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| 5 | * Architecture-specific specific support for VGA device on
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| 6 | * non-0 I/O hose
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| 7 |
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| 8 |
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| 9 | #include <linux/pci.h>
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| 10 | #include <linux/init.h>
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| 11 | #include <linux/tty.h>
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| 12 | #include <linux/console.h>
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| 13 | #include <linux/vt.h>
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| 14 | #include <asm/vga.h>
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| 15 | #include <asm/machvec.h>
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| 16 |
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| 17 | #include "pci_impl.h"
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| 18 | #include "proto.h"
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| 19 |
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| 20 | #ifdef CONFIG_VGA_HOSE
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| 21 |
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| 22 | struct pci_controller *pci_vga_hose;
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| 23 | static struct resource alpha_vga = {
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| 24 | .name = "alpha-vga+",
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| 25 | .flags = IORESOURCE_IO,
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| 26 | .start = 0x3C0,
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| 27 | .end = 0x3DF
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| 28 | };
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| 29 |
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| 30 | static struct pci_controller * __init
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| 31 | default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2)
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| 32 | {
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| 33 | if (h2->index < h1->index)
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| 34 | return h2;
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| 35 |
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| 36 | return h1;
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| 37 | }
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| 38 |
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| 39 | void __init
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| 40 | locate_and_init_vga(void *(*sel_func)(void *, void *))
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| 41 | {
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| 42 | struct pci_controller *hose = NULL;
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| 43 | struct pci_dev *dev = NULL;
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| 44 |
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| 45 |
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| 46 | if (!sel_func) sel_func = (void *)default_vga_hose_select;
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| 47 |
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| 48 |
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| 49 | for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) {
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| 50 | if (!hose)
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| 51 | hose = dev->sysdata;
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| 52 | else
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| 53 | hose = sel_func(hose, dev->sysdata);
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| 54 | }
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| 55 |
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| 56 |
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| 57 | if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose))
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| 58 | return;
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| 59 |
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| 60 |
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| 61 | alpha_vga.start += hose->io_space->start;
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| 62 | alpha_vga.end += hose->io_space->start;
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| 63 | request_resource(hose->io_space, &alpha_vga);
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| 64 |
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| 65 |
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| 66 | pci_vga_hose = hose;
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| 67 | console_lock();
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| 68 | do_take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1);
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| 69 | console_unlock();
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| 70 | }
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| 71 |
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| 72 | void __init
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| 73 | find_console_vga_hose(void)
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| 74 | {
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| 75 | u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset);
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| 76 |
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| 77 | if (pu64[7] == 3) {
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| 78 | struct pci_controller *hose;
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| 79 | int h = (pu64[30] >> 24) & 0xff;
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| 80 |
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| 81 | |
| 82 | * Our hose numbering DOES match the console's, so find
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| 83 | * the right one...
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| 84 |
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| 85 | for (hose = hose_head; hose; hose = hose->next) {
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| 86 | if (hose->index == h) break;
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| 87 | }
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| 88 |
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| 89 | if (hose) {
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| 90 | printk("Console graphics on hose %d\n", h);
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| 91 | pci_vga_hose = hose;
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| 92 | }
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| 93 | }
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| 94 | }
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| 95 |
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| 96 | #endif
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