# SPDX-License-Identifier: AGPL-3.0-or-later
# Copyright (C) 2026 David (Corey) Herrera
# Foundry TT backend — the may-I-boot-here classifier, off hardware.
#
# TOUCHES NO DEVICE. Every case is a pure function of a hand-built register
# reading, so this runs on the Mac. It has to: the code under test decides
# whether firmware is booted onto a Tensix, and the permissive failure costs a
# whole-card reset while the strict failure drops the whole model to the
# ~26 s/position CPU forward. Neither belongs on silicon.
#
#   make -f Makefile.readiness check   build and run
#   make -f Makefile.readiness red     full rebuild, then run
#
# `red` deletes the tree first and exists because a green test nobody has
# watched fail is not evidence (coding-best-practices §9). Apple ships GNU make
# 3.81, whose one-second mtime granularity silently skips a rebuild of a source
# edited in the same second as its object — a mutation loop on incremental make
# can be running the PREVIOUS binary.

CC      ?= cc
SRC_DIR := ..
BUILD   := build-readiness

CFLAGS  := -std=c99 -O1 -g \
           -Wall -Wextra -Werror -pedantic \
           -Wshadow -Wconversion -Wstrict-prototypes -Wformat=2 \
           -fstack-protector-strong \
           -I$(SRC_DIR)

DEPFLAGS := -MMD -MP

# ft_tt_launch.c is here for ft_tt_processor_reset_bit(); the rest is what it and
# ft_tt_core_status.c need to link. Nothing opens a device, and the NoC fence is
# deliberately NOT defined — every device call in these objects returns
# FT_TT_EPERM, which is the right thing for a suite that calls none of them.
BACKEND := $(SRC_DIR)/ft_tt_kmd.c \
           $(SRC_DIR)/ft_tt_arch.c \
           $(SRC_DIR)/ft_tt_arch_blackhole.c \
           $(SRC_DIR)/ft_tt_device.c \
           $(SRC_DIR)/ft_tt_tlb.c \
           $(SRC_DIR)/ft_tt_coord.c \
           $(SRC_DIR)/ft_tt_noc.c \
           $(SRC_DIR)/ft_tt_elf.c \
           $(SRC_DIR)/ft_tt_launch.c \
           $(SRC_DIR)/ft_tt_queue.c \
           $(SRC_DIR)/ft_tt_core_status.c \
           $(SRC_DIR)/ft_tt_core_readiness.c

BACKEND_OBJECTS := $(addprefix $(BUILD)/,$(notdir $(BACKEND:.c=.o)))

TARGET := $(BUILD)/test_core_readiness

.PHONY: all check red clean

all: $(TARGET)

$(BUILD):
	mkdir -p $(BUILD)

$(BUILD)/%.o: $(SRC_DIR)/%.c | $(BUILD)
	$(CC) $(CFLAGS) $(DEPFLAGS) -c $< -o $@

$(BUILD)/%.o: %.c | $(BUILD)
	$(CC) $(CFLAGS) $(DEPFLAGS) -c $< -o $@

$(TARGET): $(BACKEND_OBJECTS) $(BUILD)/test_core_readiness.o
	$(CC) $(CFLAGS) $^ -o $@ -lm

check: $(TARGET)
	./$(TARGET)

red: clean $(TARGET)
	-./$(TARGET)

clean:
	rm -rf $(BUILD)

-include $(wildcard $(BUILD)/*.d)