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95 lines
2.1 KiB
95 lines
2.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/alpha/kernel/console.c |
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* |
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* Architecture-specific specific support for VGA device on |
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* non-0 I/O hose |
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*/ |
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#include <linux/pci.h> |
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#include <linux/init.h> |
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#include <linux/tty.h> |
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#include <linux/console.h> |
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#include <linux/vt.h> |
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#include <asm/vga.h> |
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#include <asm/machvec.h> |
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#include "pci_impl.h" |
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#ifdef CONFIG_VGA_HOSE |
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struct pci_controller *pci_vga_hose; |
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static struct resource alpha_vga = { |
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.name = "alpha-vga+", |
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.flags = IORESOURCE_IO, |
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.start = 0x3C0, |
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.end = 0x3DF |
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}; |
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static struct pci_controller * __init |
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default_vga_hose_select(struct pci_controller *h1, struct pci_controller *h2) |
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{ |
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if (h2->index < h1->index) |
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return h2; |
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return h1; |
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} |
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void __init |
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locate_and_init_vga(void *(*sel_func)(void *, void *)) |
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{ |
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struct pci_controller *hose = NULL; |
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struct pci_dev *dev = NULL; |
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/* Default the select function */ |
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if (!sel_func) sel_func = (void *)default_vga_hose_select; |
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/* Find the console VGA device */ |
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for(dev=NULL; (dev=pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, dev));) { |
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if (!hose) |
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hose = dev->sysdata; |
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else |
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hose = sel_func(hose, dev->sysdata); |
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} |
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/* Did we already initialize the correct one? Is there one? */ |
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if (!hose || (conswitchp == &vga_con && pci_vga_hose == hose)) |
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return; |
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/* Create a new VGA ioport resource WRT the hose it is on. */ |
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alpha_vga.start += hose->io_space->start; |
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alpha_vga.end += hose->io_space->start; |
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request_resource(hose->io_space, &alpha_vga); |
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/* Set the VGA hose and init the new console. */ |
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pci_vga_hose = hose; |
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console_lock(); |
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do_take_over_console(&vga_con, 0, MAX_NR_CONSOLES-1, 1); |
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console_unlock(); |
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} |
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void __init |
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find_console_vga_hose(void) |
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{ |
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u64 *pu64 = (u64 *)((u64)hwrpb + hwrpb->ctbt_offset); |
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if (pu64[7] == 3) { /* TERM_TYPE == graphics */ |
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struct pci_controller *hose; |
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int h = (pu64[30] >> 24) & 0xff; /* console hose # */ |
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/* |
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* Our hose numbering DOES match the console's, so find |
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* the right one... |
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*/ |
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for (hose = hose_head; hose; hose = hose->next) { |
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if (hose->index == h) break; |
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} |
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if (hose) { |
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printk("Console graphics on hose %d\n", h); |
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pci_vga_hose = hose; |
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} |
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} |
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} |
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#endif
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