asm-generic: add legacy I/O header files
The dma.h, hw_irq.h, serial.h and timex.h files originally described PC-style i8237, i8259A, i8250, i8253 and i8255 chips as well as the VGA style text mode graphics. Modern architectures live happily without these specific interfaces, but a few definitions from these headers keep getting used in common code. The new generic headers are what most architectures use anyway nowadays, just implementing the minimal definitions. Signed-off-by: Remis Lima Baima <remis.developer@googlemail.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Родитель
aafe4dbed0
Коммит
ae49e80795
|
@ -0,0 +1,15 @@
|
|||
#ifndef __ASM_GENERIC_DMA_H
|
||||
#define __ASM_GENERIC_DMA_H
|
||||
/*
|
||||
* This file traditionally describes the i8237 PC style DMA controller.
|
||||
* Most architectures don't have these any more and can get the minimal
|
||||
* implementation from kernel/dma.c by not defining MAX_DMA_CHANNELS.
|
||||
*
|
||||
* Some code relies on seeing MAX_DMA_ADDRESS though.
|
||||
*/
|
||||
#define MAX_DMA_ADDRESS PAGE_OFFSET
|
||||
|
||||
extern int request_dma(unsigned int dmanr, const char *device_id);
|
||||
extern void free_dma(unsigned int dmanr);
|
||||
|
||||
#endif /* __ASM_GENERIC_DMA_H */
|
|
@ -0,0 +1,9 @@
|
|||
#ifndef __ASM_GENERIC_HW_IRQ_H
|
||||
#define __ASM_GENERIC_HW_IRQ_H
|
||||
/*
|
||||
* hw_irq.h has internal declarations for the low-level interrupt
|
||||
* controller, like the original i8259A.
|
||||
* In general, this is not needed for new architectures.
|
||||
*/
|
||||
|
||||
#endif /* __ASM_GENERIC_HW_IRQ_H */
|
|
@ -0,0 +1,23 @@
|
|||
#ifndef __ASM_GENERIC_PARPORT_H
|
||||
#define __ASM_GENERIC_PARPORT_H
|
||||
|
||||
/*
|
||||
* An ISA bus may have i8255 parallel ports at well-known
|
||||
* locations in the I/O space, which are scanned by
|
||||
* parport_pc_find_isa_ports.
|
||||
*
|
||||
* Without ISA support, the driver will only attach
|
||||
* to devices on the PCI bus.
|
||||
*/
|
||||
|
||||
static int __devinit parport_pc_find_isa_ports(int autoirq, int autodma);
|
||||
static int __devinit parport_pc_find_nonpci_ports(int autoirq, int autodma)
|
||||
{
|
||||
#ifdef CONFIG_ISA
|
||||
return parport_pc_find_isa_ports(autoirq, autodma);
|
||||
#else
|
||||
return 0;
|
||||
#endif
|
||||
}
|
||||
|
||||
#endif /* __ASM_GENERIC_PARPORT_H */
|
|
@ -0,0 +1,13 @@
|
|||
#ifndef __ASM_GENERIC_SERIAL_H
|
||||
#define __ASM_GENERIC_SERIAL_H
|
||||
|
||||
/*
|
||||
* This should not be an architecture specific #define, oh well.
|
||||
*
|
||||
* Traditionally, it just describes i8250 and related serial ports
|
||||
* that have this clock rate.
|
||||
*/
|
||||
|
||||
#define BASE_BAUD (1843200 / 16)
|
||||
|
||||
#endif /* __ASM_GENERIC_SERIAL_H */
|
|
@ -0,0 +1,22 @@
|
|||
#ifndef __ASM_GENERIC_TIMEX_H
|
||||
#define __ASM_GENERIC_TIMEX_H
|
||||
|
||||
/*
|
||||
* If you have a cycle counter, return the value here.
|
||||
*/
|
||||
typedef unsigned long cycles_t;
|
||||
#ifndef get_cycles
|
||||
static inline cycles_t get_cycles(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Architectures are encouraged to implement read_current_timer
|
||||
* and define this in order to avoid the expensive delay loop
|
||||
* calibration during boot.
|
||||
*/
|
||||
#undef ARCH_HAS_READ_CURRENT_TIMER
|
||||
|
||||
#endif /* __ASM_GENERIC_TIMEX_H */
|
|
@ -0,0 +1,24 @@
|
|||
/*
|
||||
* Access to VGA videoram
|
||||
*
|
||||
* (c) 1998 Martin Mares <mj@ucw.cz>
|
||||
*/
|
||||
#ifndef __ASM_GENERIC_VGA_H
|
||||
#define __ASM_GENERIC_VGA_H
|
||||
|
||||
/*
|
||||
* On most architectures that support VGA, we can just
|
||||
* recalculate addresses and then access the videoram
|
||||
* directly without any black magic.
|
||||
*
|
||||
* Everyone else needs to ioremap the address and use
|
||||
* proper I/O accesses.
|
||||
*/
|
||||
#ifndef VGA_MAP_MEM
|
||||
#define VGA_MAP_MEM(x, s) (unsigned long)phys_to_virt(x)
|
||||
#endif
|
||||
|
||||
#define vga_readb(x) (*(x))
|
||||
#define vga_writeb(x, y) (*(y) = (x))
|
||||
|
||||
#endif /* _ASM_GENERIC_VGA_H */
|
Загрузка…
Ссылка в новой задаче