diff options
Diffstat (limited to 'src/pru/pru0.c')
| -rw-r--r-- | src/pru/pru0.c | 135 |
1 files changed, 21 insertions, 114 deletions
diff --git a/src/pru/pru0.c b/src/pru/pru0.c index efede044..57d55d27 100644 --- a/src/pru/pru0.c +++ b/src/pru/pru0.c @@ -8,17 +8,16 @@ #include <stdint.h> // uint32_t #include <string.h> // memset #include <pru/io.h> // write_r31 -#include <pru_cfg.h> // CT_CFG -#include <pru_intc.h> // CT_INTC #include <pru_rpmsg.h> // pru_rpmsg_send #include <pru_virtio_ids.h> // VIRTIO_ID_RPMSG -#include <rsc_types.h> // resource_table #include "board/io.h" // readl #include "board/misc.h" // console_sendf #include "command.h" // command_encode_add_frame #include "compiler.h" // __section #include "internal.h" // SHARED_MEM #include "sched.h" // sched_shutdown +#include "intc_map_0.h" +#include "resource_table.h" struct pru_rpmsg_transport transport; static uint16_t transport_dst; @@ -32,8 +31,7 @@ static uint16_t transport_dst; #define CHAN_DESC "Channel 30" #define CHAN_PORT 30 -#define RPMSG_HDR_SIZE 16 -static uint8_t transmit_buf[RPMSG_BUF_SIZE - RPMSG_HDR_SIZE]; +static uint8_t transmit_buf[RPMSG_MESSAGE_SIZE]; static int transmit_pos; // Transmit all pending message blocks @@ -195,7 +193,7 @@ static void process_io(void) { for (;;) { - CT_INTC.SECR0 = ((1 << KICK_PRU0_FROM_ARM_EVENT) + PRU_INTC.SECR0 = ((1 << KICK_PRU0_FROM_ARM_EVENT) | (1 << KICK_PRU0_EVENT)); check_can_send(); int can_sleep = check_can_read(); @@ -251,112 +249,6 @@ console_sendf(const struct command_encoder *ce, va_list args) } -/**************************************************************** - * Resource table - ****************************************************************/ - -/* - * Sizes of the virtqueues (expressed in number of buffers supported, - * and must be power of 2) - */ -#define PRU_RPMSG_VQ0_SIZE 16 -#define PRU_RPMSG_VQ1_SIZE 16 - -/* - * The feature bitmap for virtio rpmsg - */ -#define VIRTIO_RPMSG_F_NS 0 //name service notifications - -/* This firmware supports name service notifications as one of its features */ -#define RPMSG_PRU_C0_FEATURES (1 << VIRTIO_RPMSG_F_NS) - -/* Definition for unused interrupts */ -#define HOST_UNUSED 255 - -/* Mapping sysevts to a channel. Each pair contains a sysevt, channel. */ -static struct ch_map pru_intc_map[] = { - {IEP_EVENT, WAKE_PRU1_IRQ}, - {KICK_ARM_EVENT, WAKE_ARM_IRQ}, - {KICK_PRU0_FROM_ARM_EVENT, WAKE_PRU0_IRQ}, - {KICK_PRU0_EVENT, WAKE_PRU0_IRQ}, - {KICK_PRU1_EVENT, WAKE_PRU1_IRQ}, -}; - -struct my_resource_table { - struct resource_table base; - - uint32_t offset[2]; /* Should match 'num' in actual definition */ - - /* rpmsg vdev entry */ - struct fw_rsc_vdev rpmsg_vdev; - struct fw_rsc_vdev_vring rpmsg_vring0; - struct fw_rsc_vdev_vring rpmsg_vring1; - - /* intc definition */ - struct fw_rsc_custom pru_ints; -} resourceTable __section(".resource_table") = { - { - 1, /* Resource table version: only version 1 is - * supported by the current driver */ - 2, /* number of entries in the table */ - { 0, 0 }, /* reserved, must be zero */ - }, - /* offsets to entries */ - { - offsetof(struct my_resource_table, rpmsg_vdev), - offsetof(struct my_resource_table, pru_ints), - }, - - /* rpmsg vdev entry */ - { - (uint32_t)TYPE_VDEV, //type - (uint32_t)VIRTIO_ID_RPMSG, //id - (uint32_t)0, //notifyid - (uint32_t)RPMSG_PRU_C0_FEATURES,//dfeatures - (uint32_t)0, //gfeatures - (uint32_t)0, //config_len - (uint8_t)0, //status - (uint8_t)2, //num_of_vrings, only two is supported - {(uint8_t)0, (uint8_t)0 }, //reserved - /* no config data */ - }, - /* the two vrings */ - { - 0, //da, will be populated by host, can't pass it in - 16, //align (bytes), - PRU_RPMSG_VQ0_SIZE, //num of descriptors - 0, //notifyid, will be populated, can't pass right now - 0 //reserved - }, - { - 0, //da, will be populated by host, can't pass it in - 16, //align (bytes), - PRU_RPMSG_VQ1_SIZE, //num of descriptors - 0, //notifyid, will be populated, can't pass right now - 0 //reserved - }, - - { - TYPE_CUSTOM, TYPE_PRU_INTS, - sizeof(struct fw_rsc_custom_ints), - { /* PRU_INTS version */ - { - 0x0000, - /* Channel-to-host mapping, 255 for unused */ - { - WAKE_PRU0_IRQ, WAKE_PRU1_IRQ, WAKE_ARM_IRQ, - HOST_UNUSED, HOST_UNUSED, HOST_UNUSED, - HOST_UNUSED, HOST_UNUSED, HOST_UNUSED, HOST_UNUSED - }, - /* Number of evts being mapped to channels */ - (sizeof(pru_intc_map) / sizeof(struct ch_map)), - /* Pointer to the structure containing mapped events */ - pru_intc_map, - }, - }, - }, -}; - /**************************************************************** * Startup @@ -368,11 +260,26 @@ int main(void) { // allow access to external memory +#if defined(__AM335X__) + /* AM335x must enable OCP master port access in order for the PRU to + * read external memories.*/ CT_CFG.SYSCFG_bit.STANDBY_INIT = 0; +#endif + + /* Clear the status of the PRU-ICSS system event that the ARM + will use to 'kick' us */ +#if defined(__AM335X__) + PRU_INTC.SICR_bit.STS_CLR_IDX = KICK_PRU0_FROM_ARM_EVENT; +#elif defined(__TDA4VM__) || defined(__AM62X__) + PRU_INTC.STATUS_CLR_INDEX_REG_bit.STATUS_CLR_INDEX = \ + KICK_PRU0_FROM_ARM_EVENT; +#else + #error "Unsupported SoC." +#endif // clear all irqs - CT_INTC.SECR0 = 0xffffffff; - CT_INTC.SECR1 = 0xffffffff; + PRU_INTC.SECR0 = 0xffffffff; + PRU_INTC.SECR1 = 0xffffffff; /* Make sure the Linux drivers are ready for RPMsg communication */ volatile uint8_t *status = &resourceTable.rpmsg_vdev.status; |