[IA64-SGI] pcdp: add PCDP pci interface support

Resend 2 with changes per Bjorn Helgaas comments.  Changes from original:

+ Change globals to vga_console_iobase/vga_console_membase and make them
  unconditional.
+ Address style-related comments.

Patch to extend the PCDP vga setup code to support PCI io/mem translations
for the legacy vga ioport and ram spaces on architectures (e.g. altix) which
need them.

Summary of the changes:

drivers/firmware/pcdp.c
drivers/firmware/pcdp.h
-----------------------
+ add declaration for the spec-defined PCI interface struct (pcdp_if_pci)
  as well as support macros.

+ extend setup_vga_console() to know about pcdp_if_pci and add a couple of
  globals to hold the io and mem translation offsets if present.

arch/ia64/kernel/setup.c
------------------------
+ tweek early_console_setup() to allow multiple early console setup routines
  to be called.

include/asm-ia64/vga.h
----------------------
+ make VGA_MAP_MEM vga_console_membase aware

Signed-off-by: Mark Maule <maule@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Mark Maule 2005-04-25 13:51:00 -07:00 committed by Tony Luck
parent 54522b6613
commit 66b7f8a304
4 changed files with 62 additions and 12 deletions

View File

@ -72,6 +72,8 @@ DEFINE_PER_CPU(unsigned long, ia64_phys_stacked_size_p8);
unsigned long ia64_cycles_per_usec;
struct ia64_boot_param *ia64_boot_param;
struct screen_info screen_info;
unsigned long vga_console_iobase;
unsigned long vga_console_membase;
unsigned long ia64_max_cacheline_size;
unsigned long ia64_iobase; /* virtual address for I/O accesses */
@ -273,23 +275,25 @@ io_port_init (void)
static inline int __init
early_console_setup (char *cmdline)
{
int earlycons = 0;
#ifdef CONFIG_SERIAL_SGI_L1_CONSOLE
{
extern int sn_serial_console_early_setup(void);
if (!sn_serial_console_early_setup())
return 0;
earlycons++;
}
#endif
#ifdef CONFIG_EFI_PCDP
if (!efi_setup_pcdp_console(cmdline))
return 0;
earlycons++;
#endif
#ifdef CONFIG_SERIAL_8250_CONSOLE
if (!early_serial_console_init(cmdline))
return 0;
earlycons++;
#endif
return -1;
return (earlycons) ? 0 : -1;
}
static inline void

View File

@ -16,6 +16,7 @@
#include <linux/console.h>
#include <linux/efi.h>
#include <linux/serial.h>
#include <asm/vga.h>
#include "pcdp.h"
static int __init
@ -40,10 +41,27 @@ setup_serial_console(struct pcdp_uart *uart)
}
static int __init
setup_vga_console(struct pcdp_vga *vga)
setup_vga_console(struct pcdp_device *dev)
{
#if defined(CONFIG_VT) && defined(CONFIG_VGA_CONSOLE)
if (efi_mem_type(0xA0000) == EFI_CONVENTIONAL_MEMORY) {
u8 *if_ptr;
if_ptr = ((u8 *)dev + sizeof(struct pcdp_device));
if (if_ptr[0] == PCDP_IF_PCI) {
struct pcdp_if_pci if_pci;
/* struct copy since ifptr might not be correctly aligned */
memcpy(&if_pci, if_ptr, sizeof(if_pci));
if (if_pci.trans & PCDP_PCI_TRANS_IOPORT)
vga_console_iobase = if_pci.ioport_tra;
if (if_pci.trans & PCDP_PCI_TRANS_MMIO)
vga_console_membase = if_pci.mmio_tra;
}
if (efi_mem_type(vga_console_membase + 0xA0000) == EFI_CONVENTIONAL_MEMORY) {
printk(KERN_ERR "PCDP: VGA selected, but frame buffer is not MMIO!\n");
return -ENODEV;
}
@ -95,7 +113,7 @@ efi_setup_pcdp_console(char *cmdline)
dev = (struct pcdp_device *) ((u8 *) dev + dev->length)) {
if (dev->flags & PCDP_PRIMARY_CONSOLE) {
if (dev->type == PCDP_CONSOLE_VGA) {
return setup_vga_console((struct pcdp_vga *) dev);
return setup_vga_console(dev);
}
}
}

View File

@ -52,11 +52,34 @@ struct pcdp_uart {
u32 clock_rate;
u8 pci_prog_intfc;
u8 flags;
};
} __attribute__((packed));
#define PCDP_IF_PCI 1
/* pcdp_if_pci.trans */
#define PCDP_PCI_TRANS_IOPORT 0x02
#define PCDP_PCI_TRANS_MMIO 0x01
struct pcdp_if_pci {
u8 interconnect;
u8 reserved;
u16 length;
u8 segment;
u8 bus;
u8 dev;
u8 fun;
u16 dev_id;
u16 vendor_id;
u32 acpi_interrupt;
u64 mmio_tra;
u64 ioport_tra;
u8 flags;
u8 trans;
} __attribute__((packed));
struct pcdp_vga {
u8 count; /* address space descriptors */
};
} __attribute__((packed));
/* pcdp_device.flags */
#define PCDP_PRIMARY_CONSOLE 1
@ -66,7 +89,9 @@ struct pcdp_device {
u8 flags;
u16 length;
u16 efi_index;
};
/* next data is pcdp_if_pci or pcdp_if_acpi (not yet supported) */
/* next data is device specific type (currently only pcdp_vga) */
} __attribute__((packed));
struct pcdp {
u8 signature[4];
@ -81,4 +106,4 @@ struct pcdp {
u32 num_uarts;
struct pcdp_uart uart[0]; /* actual size is num_uarts */
/* remainder of table is pcdp_device structures */
};
} __attribute__((packed));

View File

@ -14,7 +14,10 @@
* videoram directly without any black magic.
*/
#define VGA_MAP_MEM(x) ((unsigned long) ioremap((x), 0))
extern unsigned long vga_console_iobase;
extern unsigned long vga_console_membase;
#define VGA_MAP_MEM(x) ((unsigned long) ioremap(vga_console_membase + (x), 0))
#define vga_readb(x) (*(x))
#define vga_writeb(x,y) (*(y) = (x))