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modified dbg() macro

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corrected irq6 handler
reimplemented MFP interrupt LED blinker in C
This commit is contained in:
Markus Fröschle
2014-05-10 13:21:11 +00:00
parent 5a836c6ca7
commit 2f311aedbf
4 changed files with 724 additions and 660 deletions
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482
sys/interrupts.c
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@@ -39,7 +39,7 @@ extern void (*rt_vbr[])(void);
#define IRQ_DEBUG
#if defined(IRQ_DEBUG)
#define dbg(format, arg...) do { xprintf("DEBUG: " format, ##arg); } while (0)
#define dbg(format, arg...) do { xprintf("DEBUG %s(): " format, __FUNCTION__, ##arg); } while (0)
#else
#define dbg(format, arg...) do { ; } while (0)
#endif
@@ -50,45 +50,45 @@ extern void (*rt_vbr[])(void);
*/
int register_interrupt_handler(uint8_t source, uint8_t level, uint8_t priority, uint8_t intr, void (*handler)(void))
{
int ipl;
int i;
volatile uint8_t *ICR = &MCF_INTC_ICR01 - 1;
uint8_t lp;
int ipl;
int i;
volatile uint8_t *ICR = &MCF_INTC_ICR01 - 1;
uint8_t lp;
source &= 63;
priority &= 7;
source &= 63;
priority &= 7;
if (source < 1 || source > 63)
{
dbg("%s: interrupt source %d not defined\r\n", __FUNCTION__, source);
return -1;
}
if (source < 1 || source > 63)
{
dbg("interrupt source %d not defined\r\n", source);
return -1;
}
lp = MCF_INTC_ICR_IL(level) | MCF_INTC_ICR_IP(priority);
lp = MCF_INTC_ICR_IL(level) | MCF_INTC_ICR_IP(priority);
/* check if this combination is already set somewhere */
for (i = 1; i < 64; i++)
{
if (ICR[i] == lp)
{
dbg("%s: level %d and priority %d already used for interrupt source %d!\r\n", __FUNCTION__,
level, priority, i);
return -1;
}
}
/* check if this combination is already set somewhere */
for (i = 1; i < 64; i++)
{
if (ICR[i] == lp)
{
dbg("level %d and priority %d already used for interrupt source %d!\r\n",
level, priority, i);
return -1;
}
}
/* disable interrupts */
ipl = set_ipl(7);
/* disable interrupts */
ipl = set_ipl(7);
VBR[64 + source] = handler; /* first 64 vectors are system exceptions */
VBR[64 + source] = handler; /* first 64 vectors are system exceptions */
/* set level and priority in interrupt controller */
ICR[source] = lp;
/* set level and priority in interrupt controller */
ICR[source] = lp;
/* set interrupt mask to where it was before */
set_ipl(ipl);
/* set interrupt mask to where it was before */
set_ipl(ipl);
return 0;
return 0;
}
#ifndef MAX_ISR_ENTRY
@@ -98,10 +98,10 @@ int register_interrupt_handler(uint8_t source, uint8_t level, uint8_t priority,
typedef struct
{
int vector;
int (*handler)(void *, void *);
void *hdev;
void *harg;
int vector;
int (*handler)(void *, void *);
void *hdev;
void *harg;
} ISRENTRY;
ISRENTRY isrtab[MAX_ISR_ENTRY];
@@ -109,132 +109,136 @@ ISRENTRY isrtab[MAX_ISR_ENTRY];
void isr_init(void)
{
int index;
int index;
for (index = 0; index < MAX_ISR_ENTRY; index++)
{
isrtab[index].vector = 0;
isrtab[index].handler = 0;
isrtab[index].hdev = 0;
isrtab[index].harg = 0;
}
for (index = 0; index < MAX_ISR_ENTRY; index++)
{
isrtab[index].vector = 0;
isrtab[index].handler = 0;
isrtab[index].hdev = 0;
isrtab[index].harg = 0;
}
}
int isr_register_handler(int vector, int (*handler)(void *, void *), void *hdev, void *harg)
{
/*
* This function places an interrupt handler in the ISR table,
* thereby registering it so that the low-level handler may call it.
*
* The two parameters are intended for the first arg to be a
* pointer to the device itself, and the second a pointer to a data
* structure used by the device driver for that particular device.
*/
int index;
/*
* This function places an interrupt handler in the ISR table,
* thereby registering it so that the low-level handler may call it.
*
* The two parameters are intended for the first arg to be a
* pointer to the device itself, and the second a pointer to a data
* structure used by the device driver for that particular device.
*/
int index;
if ((vector == 0) || (handler == NULL))
{
dbg("%s: illegal vector or handler!\r\n", __FUNCTION__);
return false;
}
if ((vector == 0) || (handler == NULL))
{
dbg("illegal vector or handler!\r\n");
return false;
}
for (index = 0; index < MAX_ISR_ENTRY; index++)
{
if (isrtab[index].vector == vector)
{
/* one cross each, only! */
dbg("%s: already set handler with this vector (%d, %d)\r\n", __FUNCTION__, vector);
return false;
}
for (index = 0; index < MAX_ISR_ENTRY; index++)
{
if (isrtab[index].vector == vector)
{
/* one cross each, only! */
dbg("already set handler with this vector (%d, %d)\r\n", vector);
return false;
}
if (isrtab[index].vector == 0)
{
isrtab[index].vector = vector;
isrtab[index].handler = handler;
isrtab[index].hdev = hdev;
isrtab[index].harg = harg;
if (isrtab[index].vector == 0)
{
isrtab[index].vector = vector;
isrtab[index].handler = handler;
isrtab[index].hdev = hdev;
isrtab[index].harg = harg;
return true;
}
}
dbg("%s: no available slots to register handler for vector %d\n\r", __FUNCTION__, vector);
return true;
}
}
dbg("no available slots to register handler for vector %d\n\r", vector);
return false; /* no available slots */
return false; /* no available slots */
}
void isr_remove_handler(int (*handler)(void *, void *))
{
/*
* This routine removes from the ISR table all
* entries that matches 'handler'.
*/
int index;
/*
* This routine removes from the ISR table all
* entries that matches 'handler'.
*/
int index;
for (index = 0; index < MAX_ISR_ENTRY; index++)
{
if (isrtab[index].handler == handler)
{
isrtab[index].vector = 0;
isrtab[index].handler = 0;
isrtab[index].hdev = 0;
isrtab[index].harg = 0;
for (index = 0; index < MAX_ISR_ENTRY; index++)
{
if (isrtab[index].handler == handler)
{
isrtab[index].vector = 0;
isrtab[index].handler = 0;
isrtab[index].hdev = 0;
isrtab[index].harg = 0;
return;
}
}
dbg("%s: no such handler registered (handler=%p\r\n", __FUNCTION__, handler);
return;
}
}
dbg("no such handler registered (handler=%p\r\n", handler);
}
bool isr_execute_handler(int vector)
{
/*
* This routine searches the ISR table for an entry that matches
* 'vector'. If one is found, then 'handler' is executed.
*/
int index;
bool retval = false;
/*
* This routine searches the ISR table for an entry that matches
* 'vector'. If one is found, then 'handler' is executed.
*/
int index;
bool retval = false;
/*
* First locate a BaS Interrupt Service Routine handler.
*/
for (index = 0; index < MAX_ISR_ENTRY; index++)
{
if (isrtab[index].vector == vector)
{
retval = true;
if (isrtab[index].handler(isrtab[index].hdev, isrtab[index].harg))
{
return retval;
}
}
}
dbg("%s: no BaS isr handler for vector %d found\r\n", __FUNCTION__, vector);
return retval;
/*
* locate a BaS Interrupt Service Routine handler.
*/
for (index = 0; index < MAX_ISR_ENTRY; index++)
{
if (isrtab[index].vector == vector)
{
retval = true;
if (isrtab[index].handler(isrtab[index].hdev, isrtab[index].harg))
{
return retval;
}
}
}
dbg("no BaS isr handler for vector %d found\r\n", vector);
return retval;
}
/*
* PIC interrupt handler for Firebee
*/
void pic_interrupt_handler(void)
{
uint8_t rcv_byte;
uint8_t rcv_byte;
rcv_byte = MCF_PSC3_PSCRB_8BIT;
if (rcv_byte == 2) // PIC requests RTC data
{
uint8_t *rtc_reg= (uint8_t *) 0xffff8961;
uint8_t *rtc_data = (uint8_t *) 0xffff8963;
int index = 0;
rcv_byte = MCF_PSC3_PSCRB_8BIT;
if (rcv_byte == 2) // PIC requests RTC data
{
uint8_t *rtc_reg= (uint8_t *) 0xffff8961;
uint8_t *rtc_data = (uint8_t *) 0xffff8963;
int index = 0;
xprintf("PIC interrupt requesting RTC data\r\n");
xprintf("PIC interrupt requesting RTC data\r\n");
MCF_PSC3_PSCTB_8BIT = 0x82; // header byte to PIC
do
{
*rtc_reg = 0;
MCF_PSC3_PSCTB_8BIT = *rtc_data;
} while (index++ < 64);
}
MCF_PSC3_PSCTB_8BIT = 0x82; // header byte to PIC
do
{
*rtc_reg = 0;
MCF_PSC3_PSCTB_8BIT = *rtc_data;
} while (index++ < 64);
}
}
extern int32_t video_sbt;
@@ -242,106 +246,166 @@ extern int32_t video_tlb;
void video_addr_timeout(void)
{
uint32_t addr = 0x0L;
uint32_t *src;
uint32_t *dst;
uint32_t asid;
uint32_t addr = 0x0L;
uint32_t *src;
uint32_t *dst;
uint32_t asid;
dbg("%s:\r\n", __FUNCTION__);
flush_and_invalidate_caches();
dbg("video address timeout\r\n");
flush_and_invalidate_caches();
do
{
uint32_t tlb;
uint32_t page_attr;
do
{
uint32_t tlb;
uint32_t page_attr;
/*
* search tlb entry id for addr (if not available, the MMU
* will provide a new one based on its LRU algorithm)
*/
MCF_MMU_MMUAR = addr;
MCF_MMU_MMUOR =
MCF_MMU_MMUOR_STLB |
MCF_MMU_MMUOR_RW |
MCF_MMU_MMUOR_ACC;
NOP();
tlb = (MCF_MMU_MMUOR >> 16) & 0xffff;
/*
* retrieve tlb entry with the found TLB entry id
*/
MCF_MMU_MMUAR = tlb;
MCF_MMU_MMUOR =
/*
* search tlb entry id for addr (if not available, the MMU
* will provide a new one based on its LRU algorithm)
*/
MCF_MMU_MMUAR = addr;
MCF_MMU_MMUOR =
MCF_MMU_MMUOR_STLB |
MCF_MMU_MMUOR_ADR |
MCF_MMU_MMUOR_RW |
MCF_MMU_MMUOR_ACC;
NOP();
NOP();
tlb = (MCF_MMU_MMUOR >> 16) & 0xffff;
asid = (MCF_MMU_MMUTR >> 2) & 0x1fff; /* fetch ASID of page */;
if (asid != sca_page_ID) /* check if screen area */
{
addr += 0x100000;
continue; /* next page */
}
/* modify found TLB entry */
if (addr == 0x0)
{
page_attr =
MCF_MMU_MMUDR_LK |
MCF_MMU_MMUDR_SZ(0) |
MCF_MMU_MMUDR_CM(0) |
MCF_MMU_MMUDR_R |
MCF_MMU_MMUDR_W |
MCF_MMU_MMUDR_X;
}
else
{
page_attr =
MCF_MMU_MMUTR_SG |
MCF_MMU_MMUTR_V;
}
MCF_MMU_MMUTR = addr;
MCF_MMU_MMUDR = page_attr;
MCF_MMU_MMUOR =
/*
* retrieve tlb entry with the found TLB entry id
*/
MCF_MMU_MMUAR = tlb;
MCF_MMU_MMUOR =
MCF_MMU_MMUOR_STLB |
MCF_MMU_MMUOR_ADR |
MCF_MMU_MMUOR_ADR |
MCF_MMU_MMUOR_RW |
MCF_MMU_MMUOR_ACC;
NOP();
asid = (MCF_MMU_MMUTR >> 2) & 0x1fff; /* fetch ASID of page */;
if (asid != sca_page_ID) /* check if screen area */
{
addr += 0x100000;
continue; /* next page */
}
/* modify found TLB entry */
if (addr == 0x0)
{
page_attr =
MCF_MMU_MMUDR_LK |
MCF_MMU_MMUDR_SZ(0) |
MCF_MMU_MMUDR_CM(0) |
MCF_MMU_MMUDR_R |
MCF_MMU_MMUDR_W |
MCF_MMU_MMUDR_X;
}
else
{
page_attr =
MCF_MMU_MMUTR_SG |
MCF_MMU_MMUTR_V;
}
MCF_MMU_MMUTR = addr;
MCF_MMU_MMUDR = page_attr;
MCF_MMU_MMUOR =
MCF_MMU_MMUOR_STLB |
MCF_MMU_MMUOR_ADR |
MCF_MMU_MMUOR_ACC |
MCF_MMU_MMUOR_UAA;
NOP();
MCF_MMU_MMUOR_UAA;
NOP();
dst = (uint32_t *) 0x60000000 + addr;
src = (uint32_t *) addr;
while (dst < (uint32_t *) 0x60000000 + addr + 0x10000)
{
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
}
{
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
*dst++ = *src++;
}
addr += 0x100000;
} while (addr < 0xd00000);
video_tlb = 0x2000;
video_sbt = 0;
addr += 0x100000;
} while (addr < 0xd00000);
video_tlb = 0x2000;
video_sbt = 0;
}
static uint32_t blinker = 0;
/*
* blink the Firebee's LED to show we are still alive
*/
void blink_led(void)
{
if ((blinker++ & 0x80) > 0)
{
MCF_GPIO_PODR_FEC1L |= (1 << 4); /* LED off */
}
else
{
MCF_GPIO_PODR_FEC1L &= ~(1 << 4); /* LED on */
}
}
/*
* Atari MFP interrupt registers.
*
* TODO: should go into a header file
*/
#define FALCON_MFP_IERA *((volatile uint8_t *) 0xfffffa07)
#define FALCON_MFP_IERB *((volatile uint8_t *) 0xfffffa09)
#define FALCON_MFP_IPRA *((volatile uint8_t *) 0xfffffa0b)
#define FALCON_MFP_IPRB *((volatile uint8_t *) 0xfffffa0d)
#define FALCON_MFP_IMRA *((volatile uint8_t *) 0xfffffa13)
#define FALCON_MFP_IMRB *((volatile uint8_t *) 0xfffffa15)
bool irq6_acsi_dma_interrupt(void)
{
dbg("ACSI DMA interrupt\r\n");
/*
* TODO: implement handler
*/
return false;
}
bool irq6_interrupt_handler(uint32_t sf1, uint32_t sf2)
{
MCF_EPORT_EPFR = 0x40; /* clear int6 from edge port */
bool handled = false;
dbg("%s: irq6!\r\n", __FUNCTION__);
MCF_EPORT_EPFR &= (1 << 6); /* clear int6 from edge port */
if (video_sbt != 0 && (video_sbt - 0x70000000) > MCF_SLT0_SCNT)
{
video_addr_timeout();
}
if (video_sbt != 0 && (video_sbt - 0x70000000) > MCF_SLT0_SCNT)
{
video_addr_timeout();
handled = true;
}
return false;
/*
* check if ACSI DMA interrupt
*/
if (FALCON_MFP_IERA & (1 << 7))
{
/* ACSI interrupt is enabled */
if (FALCON_MFP_IPRA & (1 << 7))
{
irq6_acsi_dma_interrupt();
handled = true;
}
}
if (FALCON_MFP_IPRA || FALCON_MFP_IPRB)
{
blink_led();
}
return handled;
}