void
pcnet_reset(paddr_t base, int mem_mapped) {
uintptr_t io_base;
io_base = startup_io_map(0x100, base);
outle16(io_base + PCNET_RAP, PCNET_CSR0);
outle16(io_base + PCNET_RDP, PCNET_CSR0_STOP);
startup_io_unmap(io_base);
}
/*******************************************************************************
* ep9301_config_pic
*
* This routine will initialize the 2 Vectored Interrupt Controllers in the
* Cirrus Logic EP93xx family of processors.
*
* In order to handle the number of interrupts within the EP93xx, 2 separate
* interrupt controllers are cascaded together to form 1 larger controller.
* There is not much documentation on how this cascading of interrupts works as
* it is not a true cascade. There is some logic which allows the second
* controller to be daisy chained through the first controller which is actually
* connected to the processor. There is no documentation on how prioritization
* works for non vectored interrupts or the prioritization of the second
* controller relative to the first. The only remote suggestion that they are
* handled as 32 priority interrupts starting with controller 1 followed by
* controller 2 is on page 118 of the User Guide which says ...
*
* "Vector Control Registers. The 32 VICxVectCntl0 through VICxVectCnt15
* registers select the interrupt source for the vectored interrupt."
*
* My interpretation is that vector 0 through 15 on controller 1 followed by
* vector 0 through 15 on controller 2 is the prioritization.
*
* This still leaves the problem that we don't know which controller to look
* at first without looking at the status register for each ... which implies
* that the prioritization is completely under software control. In other words,
* software must decide to either read controller 1 or 2 status first, effectively
* prioritizing one set of 32 interrupts over the other 32. Then, because some of
* the interrupts are not vectored, we must choose bits in the status register.
* However, if the vector address read when none of the interrupts programmed as
* vectored interrupts is the default vector, then the sequence can flow as
* follows (I will prioritize controller 1 interrupts over controller 2)
*
* if (vic1_status != 0)
* {
* if (vic1_vector != default vector)
* id = vect_table[vic1_vector]
* else
* id = first bit set in vic1_status
* }
* else if (vic2_status != 0)
* {
* if (vic1_vector != default vector)
* id = vect_table[vic2_vector]
* else
* id = first bit set in vic2_status
* }
* else
* spurious interrupt
*
* return id
*
* This is all greatly complicated by the fact that only 1/2 of the interrupts
* in each controller are vectored and prioritized not to mention the
* prioritization between IRQ and FIQ interrupts.
* To properly support prioritized interrupts and decouple them from the assigned
* internal id's is going to require some more thought so for now I am not going
* to use the hardware prioritization of the vectored interrupts and instead
* simply do a first bit set prioritization of interrupts as follows
*
* VIC1, 31 -> 0
* VIC2, 31 -> 0
*
* implying that in the case of multiple occurring interrupts, VIC1, interrupt
* 31 (documented interrupt source 31) is the highest in the system and VIC2,
* interrupt 0 (documented interrupt source 32) is the lowest.
*
* Additionally, FIQ is not going to be used for now.
*
* Returns: the number of interrupt vectors assigned
*
* Implementation Note:
*
*/
uint32_t ep9301_config_pic(uint32_t os_vector_base, uint32_t pic_vector_base, vector_tbl_t *reg_vectors)
{
uintptr_t base = startup_io_map((EP93xx_VIC_CTRL2_BASE - EP93xx_VIC_CTRL1_BASE) + EP93xx_VIC_CTRL2_SIZE, EP93xx_VIC_CTRL1_BASE);
unsigned hwi_off;
unsigned i;
/*
* check the peripheral ID registers. We will assert on the truth of valid_pic_id() since a change
* may suggest a difference in the device behaviour which may need to be reflected in a
* code change
*/
ASSERT(valid_pic_id());
ASSERT(pic_vector_base == os_vector_base); // re-mapping not supported (yet)
reg_vectors->start = pic_vector_base;
reg_vectors->num = 0;
/* set all the vector bases */
intrs[0].vector_base = os_vector_base;
ASSERT(intrs[0].num_vectors > 0);
reg_vectors->num += intrs[0].num_vectors;
for (i=1; i<NUM_ELTS(intrs); i++)
{
intrs[i].vector_base = intrs[i - 1].vector_base + intrs[i - 1].num_vectors;
ASSERT(intrs[i].num_vectors > 0);
reg_vectors->num += intrs[i].num_vectors;
}
/* add the interrupt info section */
add_interrupt_array(intrs, sizeof(intrs));
/* disable and clear all interrupts. Note that we do not check EP93xx_VIC_INT_RAW because
* some devices do actually have interrupts asserted and this is reflected in the RAW register(s) */
out32(VIC1(EP93xx_VIC_INT_CLEAR), 0xFFFFFFFFU);
out32(VIC1(EP93xx_VIC_SWINT_CLEAR), 0xFFFFFFFFU);
ASSERT(in32(VIC1(EP93xx_VIC_INT_ENABLE)) == 0);
ASSERT(in32(VIC1(EP93xx_VIC_SWINT_ENABLE)) == 0);
ASSERT(in32(VIC1(EP93xx_VIC_IRQ_STATUS)) == 0);
ASSERT(in32(VIC1(EP93xx_VIC_FIQ_STATUS)) == 0);
out32(VIC2(EP93xx_VIC_INT_CLEAR), 0xFFFFFFFFU);
out32(VIC2(EP93xx_VIC_SWINT_CLEAR), 0xFFFFFFFFU);
ASSERT(in32(VIC2(EP93xx_VIC_INT_ENABLE)) == 0);
ASSERT(in32(VIC2(EP93xx_VIC_SWINT_ENABLE)) == 0);
ASSERT(in32(VIC2(EP93xx_VIC_IRQ_STATUS)) == 0);
ASSERT(in32(VIC2(EP93xx_VIC_FIQ_STATUS)) == 0);
/* set privileged access to interrupt controller registers */
out32(VIC1(EP93xx_VIC_PROTECTION), 0x0);
out32(VIC2(EP93xx_VIC_PROTECTION), 0x0);
/* by default, all interrupts will generate an IRQ (FIQ not used) */
out32(VIC1(EP93xx_VIC_INT_SELECT), 0);
out32(VIC2(EP93xx_VIC_INT_SELECT), 0);
/* place HWI_ILLEGAL_VECTOR into the default vector(s) */
out32(VIC1(EP93xx_VIC_VEC_ADDR_DFLT), HWI_ILLEGAL_VECTOR);
out32(VIC2(EP93xx_VIC_VEC_ADDR_DFLT), HWI_ILLEGAL_VECTOR);
/* disable the use of vectored interrupts for now */
in32(VIC1(EP93xx_VIC_VEC_ADDR_CURR));
out32(VIC1(EP93xx_VIC_VEC_ADDR_CURR), 0);
in32(VIC2(EP93xx_VIC_VEC_ADDR_CURR));
out32(VIC2(EP93xx_VIC_VEC_ADDR_CURR), 0);
for (i=0; i<16; i++)
{
out32(VIC1(EP93xx_VIC_VEC_ADDR(i)), HWI_ILLEGAL_VECTOR);
out32(VIC1(EP93xx_VIC_VEC_CTRL(i)), 0);
out32(VIC2(EP93xx_VIC_VEC_ADDR(i)), HWI_ILLEGAL_VECTOR);
out32(VIC2(EP93xx_VIC_VEC_CTRL(i)), 0);
}
/* TIMER1 - interrupt 4 */
hwitag_set_avail_ivec(hwi_find_device(EP93xx_HWI_TIMER, 0), -1, 4);
/* TIMER2 - interrupt 5 */
hwitag_set_avail_ivec(hwi_find_device(EP93xx_HWI_TIMER, 1), -1, 5);
/* TIMER3 - interrupt 51 */
hwitag_set_avail_ivec(hwi_find_device(EP93xx_HWI_TIMER, 2), -1, 51);
/* WATCHDOG TIMER - interrupt 36 */
hwitag_set_avail_ivec(hwi_find_device(EP93xx_HWI_WDOG, 0), -1, 36);
/* DMA channels - Note that the order of vector assignment in the HWINFO section will be
* memory to memory 0 - 17
* memory to memory 1 - 18
* memory to peripheral 0 - 7
* memory to peripheral 1 - 8
* memory to peripheral 2 - 9
* memory to peripheral 3 - 10
* memory to peripheral 4 - 11
* memory to peripheral 5 - 12
* memory to peripheral 6 - 13
* memory to peripheral 7 - 14
* memory to peripheral 8 - 15
* memory to peripheral 9 - 16
*/
if ((hwi_off = hwi_find_device(EP93xx_HWI_DMA, 0)) != HWI_NULL_OFF)
{
hwitag_set_ivec(hwi_off, 0, 17);
hwitag_set_ivec(hwi_off, 1, 18);
hwitag_set_ivec(hwi_off, 2, 7);
hwitag_set_ivec(hwi_off, 3, 8);
hwitag_set_ivec(hwi_off, 4, 9);
hwitag_set_ivec(hwi_off, 5, 10);
hwitag_set_ivec(hwi_off, 6, 11);
hwitag_set_ivec(hwi_off, 7, 12);
hwitag_set_ivec(hwi_off, 8, 13);
hwitag_set_ivec(hwi_off, 9, 14);
hwitag_set_ivec(hwi_off, 10, 15);
hwitag_set_ivec(hwi_off, 11, 16);
}
/* GPIO
* 19 of the EP9301 GPIO ports are interruptible and are handled via a
* cascaded interrupt entry. In order for devices specifically connected to
* those GPIO pins to have a driver InterruptAttach() we provide the assigned
* vector ranges with 3 irqrange tags corresponding to the PORTA, PORTB and
* PORTF interrupting port pins respectively. Within the range tag assignments,
* the 'irq' field corresponds to the LSb (pin 0 of the port) and 'irq' + 'num' - 1
* corresponds to the MSb (pin 7 of the port).
*/
if ((hwi_off = hwi_find_device(EP93xx_HWI_GPIO, 0)) != HWI_NULL_OFF)
{
const unsigned num_pAB_vectors = intrs[1].num_vectors / 2;
const unsigned num_pF_vectors = intrs[2].num_vectors + intrs[3].num_vectors + intrs[4].num_vectors;
hwitag_set_ivecrange(hwi_off, 0, intrs[1].vector_base, num_pAB_vectors); // PORT A
hwitag_set_ivecrange(hwi_off, 1, intrs[1].vector_base + num_pAB_vectors, num_pAB_vectors); // PORT B
hwitag_set_ivecrange(hwi_off, 2, intrs[2].vector_base, num_pF_vectors); // PORT F
}
/* UART1 - Note that the order of vector assignment in the HWINFO section will be
* combined - 52
* Rx - 23
* Tx - 24
*/
if ((hwi_off = hwi_find_device(EP93xx_HWI_UART, 0)) != HWI_NULL_OFF)
{
hwitag_set_ivec(hwi_off, 0, 52);
hwitag_set_ivec(hwi_off, 1, 23);
hwitag_set_ivec(hwi_off, 2, 24);
}
/* UART2 - Note that the order of vector assignment in the HWINFO section will be
* combined - 54
* Rx - 25
* Tx - 26
*/
if ((hwi_off = hwi_find_device(EP93xx_HWI_UART, 1)) != HWI_NULL_OFF)
{
hwitag_set_ivec(hwi_off, 0, 54);
hwitag_set_ivec(hwi_off, 1, 25);
hwitag_set_ivec(hwi_off, 2, 26);
}
/* EXTERNAL IRQ - 2 interrupts 32, 33 and 40 for IQR0, IRQ1 and IRQ2 respectively */
if ((hwi_off = hwi_find_device(EP93xx_HWI_EXT_IRQ, 0)) != HWI_NULL_OFF)
{
hwitag_set_ivec(hwi_off, 0, 32);
hwitag_set_ivec(hwi_off, 1, 33);
hwitag_set_ivec(hwi_off, 2, 40);
}
/* RTC - Note that the order of vector assignment in the HWINFO section will be
* rtc - 37
* 64 Hz clock - 35
* 1 Hz clock - 42 (edge sensitive)
*/
if ((hwi_off = hwi_find_device(EP93xx_HWI_RTC, 0)) != HWI_NULL_OFF)
{
hwitag_set_ivec(hwi_off, 0, 37);
hwitag_set_ivec(hwi_off, 1, 35);
hwitag_set_ivec(hwi_off, 2, 42);
}
/* IrDA Device - 38 */
if ((hwi_off = hwi_find_device(EP93xx_HWI_IrDA, 0)) != HWI_NULL_OFF) {
hwitag_set_avail_ivec(hwi_off, 0, 38);
}
/* Ethernet Device */
if ((hwi_off = hwi_find_device(EP93xx_HWI_ENET, 0)) != HWI_NULL_OFF) {
hwitag_set_avail_ivec(hwi_off, 0, 39);
}
/* SSP - Note that the order of vector assignment in the HWINFO section will be
* combined - 53
* Rx - 45
* Tx - 46
*/
if ((hwi_off = hwi_find_bus(EP93xx_HWI_SSP, 0)) != HWI_NULL_OFF)
{
hwitag_set_ivec(hwi_off, 0, 53);
hwitag_set_ivec(hwi_off, 1, 45);
hwitag_set_ivec(hwi_off, 2, 46);
}
/* USB host controller - 56 */
if ((hwi_off = hwi_find_bus(EP93xx_HWI_USB, 0)) != HWI_NULL_OFF) {
hwitag_set_avail_ivec(hwi_off, 0, 56);
}
/* I2S device - 60 */
if ((hwi_off = hwi_find_device(EP93xx_HWI_I2S, 0)) != HWI_NULL_OFF) {
hwitag_set_avail_ivec(hwi_off, 0, 60);
}
/* ACC (AC97) device - 6 */
if ((hwi_off = hwi_find_device(EP93xx_HWI_AUDIO, 0)) != HWI_NULL_OFF) {
hwitag_set_avail_ivec(hwi_off, 0, 6);
}
startup_io_unmap(base);
return reg_vectors->num;
}
