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rockbox/firmware/system.c
Miika Pekkarinen 0ea4d3197e Prepare core support for the iriver bootloader supporting ROM images 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11991 a1c6a512-1295-4272-9138-f99709370657
2007-01-12 18:34:00 +00:00

965 lines
27 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 by Alan Korr
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdio.h>
#include "config.h"
#include <stdbool.h>
#include "lcd.h"
#include "font.h"
#include "system.h"
#include "kernel.h"
#include "timer.h"
#include "inttypes.h"
#include "string.h"
#ifndef SIMULATOR
long cpu_frequency = CPU_FREQ;
#endif
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
static int boost_counter = 0;
static bool cpu_idle = false;
int get_cpu_boost_counter(void)
{
return boost_counter;
}
void cpu_boost(bool on_off)
{
if(on_off)
{
/* Boost the frequency if not already boosted */
if(boost_counter++ == 0)
set_cpu_frequency(CPUFREQ_MAX);
}
else
{
/* Lower the frequency if the counter reaches 0 */
if(--boost_counter == 0)
{
if(cpu_idle)
set_cpu_frequency(CPUFREQ_DEFAULT);
else
set_cpu_frequency(CPUFREQ_NORMAL);
}
/* Safety measure */
if(boost_counter < 0)
boost_counter = 0;
}
}
void cpu_idle_mode(bool on_off)
{
cpu_idle = on_off;
/* We need to adjust the frequency immediately if the CPU
isn't boosted */
if(boost_counter == 0)
{
if(cpu_idle)
set_cpu_frequency(CPUFREQ_DEFAULT);
else
set_cpu_frequency(CPUFREQ_NORMAL);
}
}
#endif /* HAVE_ADJUSTABLE_CPU_FREQ */
#ifdef HAVE_FLASHED_ROCKBOX
static bool detect_flash_header(uint8_t *addr)
{
#ifndef BOOTLOADER
int oldmode = system_memory_guard(MEMGUARD_NONE);
#endif
struct flash_header hdr;
memcpy(&hdr, addr, sizeof(struct flash_header));
#ifndef BOOTLOADER
system_memory_guard(oldmode);
#endif
return hdr.magic == FLASH_MAGIC;
}
#endif
bool detect_flashed_romimage(void)
{
#ifdef HAVE_FLASHED_ROCKBOX
return detect_flash_header((uint8_t *)FLASH_ROMIMAGE_ENTRY);
#else
return false;
#endif /* HAVE_FLASHED_ROCKBOX */
}
bool detect_flashed_ramimage(void)
{
#ifdef HAVE_FLASHED_ROCKBOX
return detect_flash_header((uint8_t *)FLASH_RAMIMAGE_ENTRY);
#else
return false;
#endif /* HAVE_FLASHED_ROCKBOX */
}
bool detect_original_firmware(void)
{
return !(detect_flashed_ramimage() || detect_flashed_romimage());
}
#if CONFIG_CPU == SH7034
#include "led.h"
#include "system.h"
#include "rolo.h"
static const char* const irqname[] = {
"", "", "", "", "IllInstr", "", "IllSltIn","","",
"CPUAdrEr", "DMAAdrEr", "NMI", "UserBrk",
"","","","","","","","","","","","","","","","","","","",
"Trap32","Trap33","Trap34","Trap35","Trap36","Trap37","Trap38","Trap39",
"Trap40","Trap41","Trap42","Trap43","Trap44","Trap45","Trap46","Trap47",
"Trap48","Trap49","Trap50","Trap51","Trap52","Trap53","Trap54","Trap55",
"Trap56","Trap57","Trap58","Trap59","Trap60","Trap61","Trap62","Trap63",
"Irq0","Irq1","Irq2","Irq3","Irq4","Irq5","Irq6","Irq7",
"Dma0","","Dma1","","Dma2","","Dma3","",
"IMIA0","IMIB0","OVI0","", "IMIA1","IMIB1","OVI1","",
"IMIA2","IMIB2","OVI2","", "IMIA3","IMIB3","OVI3","",
"IMIA4","IMIB4","OVI4","",
"Ser0Err","Ser0Rx","Ser0Tx","Ser0TE",
"Ser1Err","Ser1Rx","Ser1Tx","Ser1TE",
"ParityEr","A/D conv","","","Watchdog","DRAMRefr"
};
#define RESERVE_INTERRUPT(number) "\t.long\t_UIE" #number "\n"
#define DEFAULT_INTERRUPT(name, number) "\t.weak\t_" #name \
"\n\t.set\t_" #name ",_UIE" #number \
"\n\t.long\t_" #name "\n"
asm (
/* Vector table.
* Handled in asm because gcc 4.x doesn't allow weak aliases to symbols
* defined in an asm block -- silly.
* Reset vectors (0..3) are handled in crt0.S */
".section\t.vectors,\"aw\",@progbits\n"
DEFAULT_INTERRUPT (GII, 4)
RESERVE_INTERRUPT ( 5)
DEFAULT_INTERRUPT (ISI, 6)
RESERVE_INTERRUPT ( 7)
RESERVE_INTERRUPT ( 8)
DEFAULT_INTERRUPT (CPUAE, 9)
DEFAULT_INTERRUPT (DMAAE, 10)
DEFAULT_INTERRUPT (NMI, 11)
DEFAULT_INTERRUPT (UB, 12)
RESERVE_INTERRUPT ( 13)
RESERVE_INTERRUPT ( 14)
RESERVE_INTERRUPT ( 15)
RESERVE_INTERRUPT ( 16) /* TCB #0 */
RESERVE_INTERRUPT ( 17) /* TCB #1 */
RESERVE_INTERRUPT ( 18) /* TCB #2 */
RESERVE_INTERRUPT ( 19) /* TCB #3 */
RESERVE_INTERRUPT ( 20) /* TCB #4 */
RESERVE_INTERRUPT ( 21) /* TCB #5 */
RESERVE_INTERRUPT ( 22) /* TCB #6 */
RESERVE_INTERRUPT ( 23) /* TCB #7 */
RESERVE_INTERRUPT ( 24) /* TCB #8 */
RESERVE_INTERRUPT ( 25) /* TCB #9 */
RESERVE_INTERRUPT ( 26) /* TCB #10 */
RESERVE_INTERRUPT ( 27) /* TCB #11 */
RESERVE_INTERRUPT ( 28) /* TCB #12 */
RESERVE_INTERRUPT ( 29) /* TCB #13 */
RESERVE_INTERRUPT ( 30) /* TCB #14 */
RESERVE_INTERRUPT ( 31) /* TCB #15 */
DEFAULT_INTERRUPT (TRAPA32, 32)
DEFAULT_INTERRUPT (TRAPA33, 33)
DEFAULT_INTERRUPT (TRAPA34, 34)
DEFAULT_INTERRUPT (TRAPA35, 35)
DEFAULT_INTERRUPT (TRAPA36, 36)
DEFAULT_INTERRUPT (TRAPA37, 37)
DEFAULT_INTERRUPT (TRAPA38, 38)
DEFAULT_INTERRUPT (TRAPA39, 39)
DEFAULT_INTERRUPT (TRAPA40, 40)
DEFAULT_INTERRUPT (TRAPA41, 41)
DEFAULT_INTERRUPT (TRAPA42, 42)
DEFAULT_INTERRUPT (TRAPA43, 43)
DEFAULT_INTERRUPT (TRAPA44, 44)
DEFAULT_INTERRUPT (TRAPA45, 45)
DEFAULT_INTERRUPT (TRAPA46, 46)
DEFAULT_INTERRUPT (TRAPA47, 47)
DEFAULT_INTERRUPT (TRAPA48, 48)
DEFAULT_INTERRUPT (TRAPA49, 49)
DEFAULT_INTERRUPT (TRAPA50, 50)
DEFAULT_INTERRUPT (TRAPA51, 51)
DEFAULT_INTERRUPT (TRAPA52, 52)
DEFAULT_INTERRUPT (TRAPA53, 53)
DEFAULT_INTERRUPT (TRAPA54, 54)
DEFAULT_INTERRUPT (TRAPA55, 55)
DEFAULT_INTERRUPT (TRAPA56, 56)
DEFAULT_INTERRUPT (TRAPA57, 57)
DEFAULT_INTERRUPT (TRAPA58, 58)
DEFAULT_INTERRUPT (TRAPA59, 59)
DEFAULT_INTERRUPT (TRAPA60, 60)
DEFAULT_INTERRUPT (TRAPA61, 61)
DEFAULT_INTERRUPT (TRAPA62, 62)
DEFAULT_INTERRUPT (TRAPA63, 63)
DEFAULT_INTERRUPT (IRQ0, 64)
DEFAULT_INTERRUPT (IRQ1, 65)
DEFAULT_INTERRUPT (IRQ2, 66)
DEFAULT_INTERRUPT (IRQ3, 67)
DEFAULT_INTERRUPT (IRQ4, 68)
DEFAULT_INTERRUPT (IRQ5, 69)
DEFAULT_INTERRUPT (IRQ6, 70)
DEFAULT_INTERRUPT (IRQ7, 71)
DEFAULT_INTERRUPT (DEI0, 72)
RESERVE_INTERRUPT ( 73)
DEFAULT_INTERRUPT (DEI1, 74)
RESERVE_INTERRUPT ( 75)
DEFAULT_INTERRUPT (DEI2, 76)
RESERVE_INTERRUPT ( 77)
DEFAULT_INTERRUPT (DEI3, 78)
RESERVE_INTERRUPT ( 79)
DEFAULT_INTERRUPT (IMIA0, 80)
DEFAULT_INTERRUPT (IMIB0, 81)
DEFAULT_INTERRUPT (OVI0, 82)
RESERVE_INTERRUPT ( 83)
DEFAULT_INTERRUPT (IMIA1, 84)
DEFAULT_INTERRUPT (IMIB1, 85)
DEFAULT_INTERRUPT (OVI1, 86)
RESERVE_INTERRUPT ( 87)
DEFAULT_INTERRUPT (IMIA2, 88)
DEFAULT_INTERRUPT (IMIB2, 89)
DEFAULT_INTERRUPT (OVI2, 90)
RESERVE_INTERRUPT ( 91)
DEFAULT_INTERRUPT (IMIA3, 92)
DEFAULT_INTERRUPT (IMIB3, 93)
DEFAULT_INTERRUPT (OVI3, 94)
RESERVE_INTERRUPT ( 95)
DEFAULT_INTERRUPT (IMIA4, 96)
DEFAULT_INTERRUPT (IMIB4, 97)
DEFAULT_INTERRUPT (OVI4, 98)
RESERVE_INTERRUPT ( 99)
DEFAULT_INTERRUPT (REI0, 100)
DEFAULT_INTERRUPT (RXI0, 101)
DEFAULT_INTERRUPT (TXI0, 102)
DEFAULT_INTERRUPT (TEI0, 103)
DEFAULT_INTERRUPT (REI1, 104)
DEFAULT_INTERRUPT (RXI1, 105)
DEFAULT_INTERRUPT (TXI1, 106)
DEFAULT_INTERRUPT (TEI1, 107)
RESERVE_INTERRUPT ( 108)
DEFAULT_INTERRUPT (ADITI, 109)
/* UIE# block.
* Must go into the same section as the UIE() handler */
"\t.text\n"
"_UIE4:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE5:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE6:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE7:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE8:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE9:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE10:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE11:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE12:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE13:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE14:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE15:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE16:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE17:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE18:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE19:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE20:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE21:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE22:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE23:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE24:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE25:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE26:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE27:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE28:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE29:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE30:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE31:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE32:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE33:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE34:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE35:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE36:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE37:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE38:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE39:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE40:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE41:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE42:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE43:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE44:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE45:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE46:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE47:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE48:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE49:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE50:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE51:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE52:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE53:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE54:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE55:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE56:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE57:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE58:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE59:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE60:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE61:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE62:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE63:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE64:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE65:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE66:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE67:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE68:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE69:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE70:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE71:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE72:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE73:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE74:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE75:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE76:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE77:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE78:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE79:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE80:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE81:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE82:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE83:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE84:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE85:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE86:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE87:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE88:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE89:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE90:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE91:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE92:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE93:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE94:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE95:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE96:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE97:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE98:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE99:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE100:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE101:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE102:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE103:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE104:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE105:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE106:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE107:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE108:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
"_UIE109:\tbsr\t_UIE\n\tmov.l\t@r15+,r4\n"
);
extern void UIE4(void); /* needed for calculating the UIE number */
void UIE (unsigned int pc) __attribute__((section(".text")));
void UIE (unsigned int pc) /* Unexpected Interrupt or Exception */
{
#if CONFIG_LED == LED_REAL
bool state = false;
int i = 0;
#endif
unsigned int n;
char str[32];
asm volatile ("sts\tpr,%0" : "=r"(n));
/* clear screen */
lcd_clear_display ();
#ifdef HAVE_LCD_BITMAP
lcd_setfont(FONT_SYSFIXED);
#endif
/* output exception */
n = (n - (unsigned)UIE4 + 12)>>2; /* get exception or interrupt number */
snprintf(str,sizeof(str),"I%02x:%s",n,irqname[n]);
lcd_puts(0,0,str);
snprintf(str,sizeof(str),"at %08x",pc);
lcd_puts(0,1,str);
#ifdef HAVE_LCD_BITMAP
lcd_update ();
#endif
while (1)
{
#if CONFIG_LED == LED_REAL
if (--i <= 0)
{
state = !state;
led(state);
i = 240000;
}
#endif
/* try to restart firmware if ON is pressed */
#if CONFIG_KEYPAD == PLAYER_PAD
if (!(PADRL & 0x20))
#elif CONFIG_KEYPAD == RECORDER_PAD
#ifdef HAVE_FMADC
if (!(PCDR & 0x0008))
#else
if (!(PBDRH & 0x01))
#endif
#elif CONFIG_KEYPAD == ONDIO_PAD
if (!(PCDR & 0x0008))
#endif
{
/* enable the watchguard timer, but don't service it */
RSTCSR_W = 0x5a40; /* Reset enabled, power-on reset */
TCSR_W = 0xa560; /* Watchdog timer mode, timer enabled, sysclk/2 */
}
}
}
void system_init(void)
{
/* Disable all interrupts */
IPRA = 0;
IPRB = 0;
IPRC = 0;
IPRD = 0;
IPRE = 0;
/* NMI level low, falling edge on all interrupts */
ICR = 0;
/* Enable burst and RAS down mode on DRAM */
DCR |= 0x5000;
/* Activate Warp mode (simultaneous internal and external mem access) */
BCR |= 0x2000;
/* Bus state controller initializations. These are only necessary when
running from flash. */
WCR1 = 0x40FD; /* Long wait states for CS6 (ATA), short for the rest. */
WCR3 = 0x8000; /* WAIT is pulled up, 1 state inserted for CS6 */
}
void system_reboot (void)
{
set_irq_level(HIGHEST_IRQ_LEVEL);
asm volatile ("ldc\t%0,vbr" : : "r"(0));
PACR2 |= 0x4000; /* for coldstart detection */
IPRA = 0;
IPRB = 0;
IPRC = 0;
IPRD = 0;
IPRE = 0;
ICR = 0;
asm volatile ("jmp @%0; mov.l @%1,r15" : :
"r"(*(int*)0),"r"(4));
}
/* Utilise the user break controller to catch invalid memory accesses. */
int system_memory_guard(int newmode)
{
static const struct {
unsigned long addr;
unsigned long mask;
unsigned short bbr;
} modes[MAXMEMGUARD] = {
/* catch nothing */
{ 0x00000000, 0x00000000, 0x0000 },
/* catch writes to area 02 (flash ROM) */
{ 0x02000000, 0x00FFFFFF, 0x00F8 },
/* catch all accesses to areas 00 (internal ROM) and 01 (free) */
{ 0x00000000, 0x01FFFFFF, 0x00FC }
};
int oldmode = MEMGUARD_NONE;
int i;
/* figure out the old mode from what is in the UBC regs. If the register
values don't match any mode, assume MEMGUARD_NONE */
for (i = MEMGUARD_NONE; i < MAXMEMGUARD; i++)
{
if (BAR == modes[i].addr && BAMR == modes[i].mask &&
BBR == modes[i].bbr)
{
oldmode = i;
break;
}
}
if (newmode == MEMGUARD_KEEP)
newmode = oldmode;
BBR = 0; /* switch off everything first */
/* always set the UBC according to the mode, in case the old settings
didn't match any valid mode */
BAR = modes[newmode].addr;
BAMR = modes[newmode].mask;
BBR = modes[newmode].bbr;
return oldmode;
}
#elif defined(CPU_ARM)
static const char* const uiename[] = {
"Undefined instruction", "Prefetch abort", "Data abort"
};
/* Unexpected Interrupt or Exception handler. Currently only deals with
exceptions, but will deal with interrupts later.
*/
void UIE(unsigned int pc, unsigned int num)
{
char str[32];
lcd_clear_display();
#ifdef HAVE_LCD_BITMAP
lcd_setfont(FONT_SYSFIXED);
#endif
lcd_puts(0, 0, uiename[num]);
snprintf(str, sizeof(str), "at %08x", pc);
lcd_puts(0, 1, str);
lcd_update();
while (1)
{
/* TODO: perhaps add button handling in here when we get a polling
driver some day.
*/
}
}
#if CONFIG_CPU==PP5020 || CONFIG_CPU==PP5024
unsigned int ipod_hw_rev;
#ifndef BOOTLOADER
extern void TIMER1(void);
extern void TIMER2(void);
#if defined(IPOD_MINI) /* mini 1 only, mini 2G uses iPod 4G code */
extern void ipod_mini_button_int(void);
void irq(void)
{
if (CPU_INT_STAT & TIMER1_MASK)
TIMER1();
else if (CPU_INT_STAT & TIMER2_MASK)
TIMER2();
else if (CPU_HI_INT_STAT & GPIO_MASK)
ipod_mini_button_int();
}
#elif (defined IRIVER_H10) || (defined IRIVER_H10_5GB) || defined(ELIO_TPJ1022) \
|| (defined SANSA_E200)
/* TODO: this should really be in the target tree, but moving it there caused
crt0.S not to find it while linking */
/* TODO: Even if it isn't in the target tree, this should be the default case */
void irq(void)
{
if (CPU_INT_STAT & TIMER1_MASK)
TIMER1();
else if (CPU_INT_STAT & TIMER2_MASK)
TIMER2();
}
#else
extern void ipod_4g_button_int(void);
void irq(void)
{
if (CPU_INT_STAT & TIMER1_MASK)
TIMER1();
else if (CPU_INT_STAT & TIMER2_MASK)
TIMER2();
else if (CPU_HI_INT_STAT & I2C_MASK)
ipod_4g_button_int();
}
#endif
#endif /* BOOTLOADER */
unsigned int current_core(void)
{
if(((*(volatile unsigned long *)(0x60000000)) & 0xff) == 0x55)
{
return CPU;
}
return COP;
}
/* TODO: The following two function have been lifted straight from IPL, and
hence have a lot of numeric addresses used straight. I'd like to use
#defines for these, but don't know what most of them are for or even what
they should be named. Because of this I also have no way of knowing how
to extend the funtions to do alternate cache configurations and/or
some other CPU frequency scaling. */
#ifndef BOOTLOADER
static void ipod_init_cache(void)
{
/* Initialising the cache in the iPod bootloader prevents Rockbox from starting */
unsigned i;
/* cache init mode? */
outl(0x4, 0x6000C000);
/* PP5002 has 8KB cache */
for (i = 0xf0004000; i < 0xf0006000; i += 16) {
outl(0x0, i);
}
outl(0x0, 0xf000f040);
outl(0x3fc0, 0xf000f044);
/* enable cache */
outl(0x1, 0x6000C000);
for (i = 0x10000000; i < 0x10002000; i += 16)
inb(i);
}
#endif
/* Not all iPod targets support CPU freq. boosting yet */
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
void set_cpu_frequency(long frequency)
{
unsigned long postmult;
if (frequency == CPUFREQ_NORMAL)
postmult = CPUFREQ_NORMAL_MULT;
else if (frequency == CPUFREQ_MAX)
postmult = CPUFREQ_MAX_MULT;
else
postmult = CPUFREQ_DEFAULT_MULT;
cpu_frequency = frequency;
/* Enable PLL? */
outl(inl(0x70000020) | (1<<30), 0x70000020);
/* Select 24MHz crystal as clock source? */
outl((inl(0x60006020) & 0x0fffff0f) | 0x20000020, 0x60006020);
/* Clock frequency = (24/8)*postmult */
outl(0xaa020000 | 8 | (postmult << 8), 0x60006034);
/* Wait for PLL relock? */
udelay(2000);
/* Select PLL as clock source? */
outl((inl(0x60006020) & 0x0fffff0f) | 0x20000070, 0x60006020);
#if defined(IPOD_COLOR) || defined(IPOD_4G) || defined(IPOD_MINI) || defined(IRIVER_H10) || defined(IRIVER_H10_5GB)
/* We don't know why the timer interrupt gets disabled on the PP5020
based ipods, but without the following line, the 4Gs will freeze
when CPU frequency changing is enabled.
Note also that a simple "CPU_INT_EN = TIMER1_MASK;" (as used
elsewhere to enable interrupts) doesn't work, we need "|=".
It's not needed on the PP5021 and PP5022 ipods.
*/
/* unmask interrupt source */
CPU_INT_EN |= TIMER1_MASK;
#endif
}
#elif !defined(BOOTLOADER)
void ipod_set_cpu_frequency(void)
{
/* Enable PLL? */
outl(inl(0x70000020) | (1<<30), 0x70000020);
/* Select 24MHz crystal as clock source? */
outl((inl(0x60006020) & 0x0fffff0f) | 0x20000020, 0x60006020);
/* Clock frequency = (24/8)*25 = 75MHz */
outl(0xaa020000 | 8 | (25 << 8), 0x60006034);
/* Wait for PLL relock? */
udelay(2000);
/* Select PLL as clock source? */
outl((inl(0x60006020) & 0x0fffff0f) | 0x20000070, 0x60006020);
}
#endif
void system_init(void)
{
#ifndef BOOTLOADER
/* The hw revision is written to the last 4 bytes of SDRAM by the
bootloader - we save it before Rockbox overwrites it. */
ipod_hw_rev = (*((volatile unsigned long*)(0x01fffffc)));
/* disable all irqs */
outl(-1, 0x60001138);
outl(-1, 0x60001128);
outl(-1, 0x6000111c);
outl(-1, 0x60001038);
outl(-1, 0x60001028);
outl(-1, 0x6000101c);
#ifndef HAVE_ADJUSTABLE_CPU_FREQ
ipod_set_cpu_frequency();
#endif
ipod_init_cache();
#endif
}
void system_reboot(void)
{
/* Reboot */
DEV_RS |= DEV_SYSTEM;
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
#elif CONFIG_CPU==PP5002
unsigned int ipod_hw_rev;
#ifndef BOOTLOADER
extern void TIMER1(void);
extern void TIMER2(void);
void irq(void)
{
if (CPU_INT_STAT & TIMER1_MASK)
TIMER1();
else if (CPU_INT_STAT & TIMER2_MASK)
TIMER2();
}
#endif
unsigned int current_core(void)
{
if(((*(volatile unsigned long *)(0xc4000000)) & 0xff) == 0x55)
{
return CPU;
}
return COP;
}
/* TODO: The following two function have been lifted straight from IPL, and
hence have a lot of numeric addresses used straight. I'd like to use
#defines for these, but don't know what most of them are for or even what
they should be named. Because of this I also have no way of knowing how
to extend the funtions to do alternate cache configurations and/or
some other CPU frequency scaling. */
#ifndef BOOTLOADER
static void ipod_init_cache(void)
{
int i =0;
/* Initialising the cache in the iPod bootloader prevents Rockbox from starting */
outl(inl(0xcf004050) & ~0x700, 0xcf004050);
outl(0x4000, 0xcf004020);
outl(0x2, 0xcf004024);
/* PP5002 has 8KB cache */
for (i = 0xf0004000; i < (int)(0xf0006000); i += 16) {
outl(0x0, i);
}
outl(0x0, 0xf000f020);
outl(0x3fc0, 0xf000f024);
outl(0x3, 0xcf004024);
}
#endif
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
void set_cpu_frequency(long frequency)
{
unsigned long postmult;
if (frequency == CPUFREQ_NORMAL)
postmult = CPUFREQ_NORMAL_MULT;
else if (frequency == CPUFREQ_MAX)
postmult = CPUFREQ_MAX_MULT;
else
postmult = CPUFREQ_DEFAULT_MULT;
cpu_frequency = frequency;
outl(0x02, 0xcf005008);
outl(0x55, 0xcf00500c);
outl(0x6000, 0xcf005010);
/* Clock frequency = (24/8)*postmult */
outl(8, 0xcf005018);
outl(postmult, 0xcf00501c);
outl(0xe000, 0xcf005010);
/* Wait for PLL relock? */
udelay(2000);
/* Select PLL as clock source? */
outl(0xa8, 0xcf00500c);
}
#elif !defined(BOOTLOADER)
static void ipod_set_cpu_speed(void)
{
outl(0x02, 0xcf005008);
outl(0x55, 0xcf00500c);
outl(0x6000, 0xcf005010);
#if 1
// 75 MHz (24/24 * 75) (default)
outl(24, 0xcf005018);
outl(75, 0xcf00501c);
#endif
#if 0
// 66 MHz (24/3 * 8)
outl(3, 0xcf005018);
outl(8, 0xcf00501c);
#endif
outl(0xe000, 0xcf005010);
udelay(2000);
outl(0xa8, 0xcf00500c);
}
#endif
void system_init(void)
{
#ifndef BOOTLOADER
ipod_hw_rev = (*((volatile unsigned long*)(0x01fffffc)));
outl(-1, 0xcf00101c);
outl(-1, 0xcf001028);
outl(-1, 0xcf001038);
#ifndef HAVE_ADJUSTABLE_CPU_FREQ
ipod_set_cpu_speed();
#endif
ipod_init_cache();
#endif
}
void system_reboot(void)
{
outl(inl(0xcf005030) | 0x4, 0xcf005030);
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
#elif CONFIG_CPU==PNX0101
interrupt_handler_t interrupt_vector[0x1d] __attribute__ ((section(".idata")));
#define IRQ_REG(reg) (*(volatile unsigned long *)(0x80300000 + (reg)))
static inline unsigned long irq_read(int reg)
{
unsigned long v, v2;
do
{
v = IRQ_REG(reg);
v2 = IRQ_REG(reg);
} while (v != v2);
return v;
}
#define IRQ_WRITE_WAIT(reg, val, cond) \
do { unsigned long v, v2; \
do { \
IRQ_REG(reg) = (val); \
v = IRQ_REG(reg); \
v2 = IRQ_REG(reg); \
} while ((v != v2) || !(cond)); \
} while (0);
static void undefined_int(void)
{
}
void irq(void)
{
int n = irq_read(0x100) >> 3;
(*(interrupt_vector[n]))();
}
void fiq(void)
{
}
void irq_enable_int(int n)
{
IRQ_WRITE_WAIT(0x404 + n * 4, 0x4010000, v & 0x10000);
}
void irq_set_int_handler(int n, interrupt_handler_t handler)
{
interrupt_vector[n + 1] = handler;
}
void system_init(void)
{
int i;
/* turn off watchdog */
(*(volatile unsigned long *)0x80002804) = 0;
/*
IRQ_WRITE_WAIT(0x100, 0, v == 0);
IRQ_WRITE_WAIT(0x104, 0, v == 0);
IRQ_WRITE_WAIT(0, 0, v == 0);
IRQ_WRITE_WAIT(4, 0, v == 0);
*/
for (i = 0; i < 0x1c; i++)
{
IRQ_WRITE_WAIT(0x404 + i * 4, 0x1e000001, (v & 0x3010f) == 1);
IRQ_WRITE_WAIT(0x404 + i * 4, 0x4000000, (v & 0x10000) == 0);
IRQ_WRITE_WAIT(0x404 + i * 4, 0x10000001, (v & 0xf) == 1);
interrupt_vector[i + 1] = undefined_int;
}
interrupt_vector[0] = undefined_int;
}
void system_reboot(void)
{
(*(volatile unsigned long *)0x80002804) = 1;
while (1);
}
int system_memory_guard(int newmode)
{
(void)newmode;
return 0;
}
#endif /* CPU_ARM */
#endif /* CONFIG_CPU */
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