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pru: Move communication code to second PRU

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Perform input and output in the second PRU so that more space is
available in the primary PRU.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2017-05-16 13:41:44 -04:00
parent b6f24e78ac
commit b85755c0ff
5 changed files with 201 additions and 138 deletions
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37
src/pru/internal.h
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@@ -2,17 +2,38 @@
#define __PRU_INTERNAL_H
// Local definitions for PRU code
#define IEP_IRQ 0
#define GOT_ARM_IRQ 1
#define WAKE_ARM_IRQ 2
#include <stdint.h> // uint32_t
#define IEP_EVENT 7
#define GOT_ARM_EVENT 17
#define WAKE_ARM_EVENT 16
#define IEP_EVENT 7
#define KICK_ARM_EVENT 16
#define KICK_PRU0_FROM_ARM_EVENT 17
#define KICK_PRU0_EVENT 18
#define KICK_PRU1_EVENT 19
#define WAKE_PRU0_IRQ 0
#define WAKE_PRU1_IRQ 1
#define WAKE_ARM_IRQ 2
#define R31_IRQ_OFFSET 30
// console.c
void console_init(void);
#define R31_WRITE_IRQ_SELECT (1<<5)
#define R31_WRITE_IRQ_OFFSET 16
// Layout of shared memory
struct shared_mem {
uint32_t signal;
uint32_t read_pos, read_count;
char read_data[512];
uint32_t send_push_pos, send_pop_pos;
struct {
uint32_t count;
char data[64];
} send_data[4];
};
#define SIGNAL_PRU0_WAITING 0xefefefef
#define SIGNAL_PRU1_READY 0xabababab
static struct shared_mem *SHARED_MEM = (void*)0x10000;
#endif // internal.h