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pru: Rework command processing so that most of it is done on pru0

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Change the command dispatch and response generation so that most of
the work is done on pru0 instead of pru1.  This allows more code to
fit into the limited space on pru1.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2017-06-29 18:14:39 -04:00
parent c1bd628ce5
commit e8356afa26
6 changed files with 222 additions and 101 deletions
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17
src/pru/Makefile
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@@ -6,28 +6,27 @@ CROSS_PREFIX=pru-
dirs-y += src/pru src/generic
dirs-y += lib/pru_rpmsg
CFLAGS += -Os -mmcu=am335x.pru1
CFLAGS += -minrt -mmcu=am335x.pru1
CFLAGS += -Ilib/pru_rpmsg/include -Ilib/pru_rpmsg/include/am335x
CFLAGS_klipper.elf := $(filter-out -mmcu=%, $(CFLAGS))
CFLAGS_klipper.elf += -Wl,-r -nostdlib -Wl,-T,src/pru/pru.lds
CFLAGS_pru0.elf := $(filter-out -mmcu=%, $(CFLAGS)) -minrt -mmcu=am335x.pru0
CFLAGS_pru1.elf := $(CFLAGS) -minrt
CFLAGS_pru0.elf := $(filter-out -mmcu=%, $(CFLAGS)) -mmcu=am335x.pru0
CFLAGS_pru1.elf := $(CFLAGS)
# Add source files
src-y := $(filter-out debugcmds.c, $(src-y))
src-y += pru/main.c pru/gpio.c
src-y += generic/crc16_ccitt.c generic/timer_irq.c
src-y += pru/main.c pru/gpio.c generic/timer_irq.c
pru0-y := pru/pru0.c
pru0-y := pru/pru0.c generic/crc16_ccitt.c command.c
pru0-y += ../lib/pru_rpmsg/pru_rpmsg.c ../lib/pru_rpmsg/pru_virtqueue.c
# Build the additional PRU0 binary
# Build the PRU binaries
target-y += $(OUT)pru0.elf $(OUT)pru1.elf
$(OUT)pru0.elf: $(patsubst %.c, $(OUT)src/%.o,$(pru0-y))
@echo " Linking $@"
$(Q)$(CC) $(CFLAGS_pru0.elf) $^ -o $@
$(Q)$(CC) $(CFLAGS_klipper.elf) $^ -o $(OUT)pru0.o
$(Q)$(CC) $(CFLAGS_pru0.elf) $(OUT)pru0.o -o $@
$(OUT)pru1.elf: $(OUT)klipper.elf
@echo " Linking $@"