File: [local] / prex-old / sys / arch / arm / gba / platform.h (download)
Revision 1.1.1.1 (vendor branch), Tue Jun 3 09:38:45 2008 UTC (16 years, 1 month ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_7_BASE, HEAD Branch point for: PREX_0_8_BASE
Changes since 1.1: +0 -0 lines
Yeah, this is an initial import of Prex, portable real-time microkernel
operating system. I wanna hack it for non-profit but fun, so let it in.
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/*
* Copyright (c) 2007, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _GBA_PLATFORM_H
#define _GBA_PLATFORM_H
/*
* Memory location
*/
#define PAGE_OFFSET 0x00000000
#define KERNEL_BASE 0x02000000
#define KERNEL_MAX 0x02400000
#define USER_BASE 0x02000000
#define USER_MAX 0x02040000
#define BOOT_INFO 0x03006000
#define BOOT_STACK 0x03007000
#define INT_STACK 0x03007900
#define SYS_STACK 0x0203ff00
#ifndef __ASSEMBLY__
/*
* Page mapping
*/
#define phys_to_virt(p_addr) (void *)((u_long)(p_addr) + PAGE_OFFSET)
#define virt_to_phys(v_addr) (void *)((u_long)(v_addr) - PAGE_OFFSET)
/*
* Kernel/User Locations
*/
#define kern_area(addr) \
(((u_long)(addr) >= KERNEL_BASE) && ((u_long)(addr) < KERNEL_MAX))
#define user_area(addr) \
(((u_long)(addr) >= USER_BASE) && ((u_long)(addr) < USER_MAX))
/*
* Interrupt
*/
#define NIRQS 14 /* number of interrupt vectors */
static __inline void
interrupt_enable(void)
{
#ifndef __lint__
u_long val;
__asm__ __volatile__(
"mrs %0, cpsr\n\t"
"bic %0, %0, #0xc0\n\t" /* Enable IRQ & FIQ */
"msr cpsr_c, %0\n\t"
:"=&r" (val)
:
: "memory");
#endif
}
static __inline void
interrupt_disable(void)
{
#ifndef __lint__
u_long val;
__asm__ __volatile__(
"mrs %0, cpsr\n\t"
"orr %0, %0, #0xc0\n\t" /* Disable IRQ & FIQ */
"msr cpsr_c, %0\n\t"
:"=&r" (val)
:
: "memory");
#endif
}
static __inline void
interrupt_save(int *sts)
{
u_long val;
__asm__ __volatile__(
"mrs %0, cpsr\n\t"
:"=&r" (val)
:
:"memory");
*sts = (int)val;
}
static __inline void
interrupt_restore(int sts)
{
__asm__ __volatile__(
"msr cpsr_c, %0\n\t"
:
:"r" (sts)
:"memory");
}
extern void interrupt_mask(int);
extern void interrupt_unmask(int, int);
extern void interrupt_setup(int, int);
extern void interrupt_init(void);
/* Interrupt mode for interrupt_setup() */
#define IMODE_EDGE 0 /* edge trigger */
#define IMODE_LEVEL 1 /* level trigger */
extern void clock_init(void);
extern void diag_init(void);
#ifdef CONFIG_DIAG_VBA
static __inline void
diag_print(char *buf)
{
__asm__ __volatile__(
"mov r0, %0\n\t"
"swi 0xff0000\n\t" /* VBA emulator call */
:
:"r" (buf)
:"r0");
}
#else
extern void diag_print(char *);
#endif
static __inline void
machine_idle(void)
{
__asm__ __volatile__(
"swi 0x20000\n\t" /* GBA BIOS call */
:::"r0", "r1", "r2", "r3");
}
static __inline void
machine_reset(void)
{
__asm__ __volatile__(
"swi 0\n\t" /* GBA BIOS call */
:::"r0", "r1", "r2", "r3");
}
extern void machine_init(void);
#endif /* !__ASSEMBLY__ */
#endif /* !_GBA_PLATFORM_H */