Merge branch '2022-04-18-dm-reducing-spl-memory-usage'

- Assorted DM cleanups from Simon.  This results in some noticeable
  binary size savings in SPL.

Makefile

@@ -1785,10 +1785,6 @@ quiet_cmd_u-boot__ ?= LTO     $@
 		-Wl,-Map,u-boot.map;						\
 		$(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
 else
-# Note: Linking efi-x86_app64 causes a segfault in the linker at present
-# when using x86_64-linux-gnu-ld.bfd
-# For now, disable --whole-archive which makes things link, although not
-# correctly
 quiet_cmd_u-boot__ ?= LD      $@
       cmd_u-boot__ ?= $(LD) $(KBUILD_LDFLAGS) $(LDFLAGS_u-boot) -o $@		\
 		-T u-boot.lds $(u-boot-init)					\

arch/sandbox/config.mk

@@ -16,7 +16,7 @@ PLATFORM_CPPFLAGS += $(shell $(SDL_CONFIG) --cflags)
 endif
 
 cmd_u-boot__ = $(CC) -o $@ -Wl,-T u-boot.lds $(u-boot-init) \
-	$(LTO_FINAL_LDFLAGS) \
+	$(KBUILD_LDFLAGS:%=-Wl,%)$(LTO_FINAL_LDFLAGS) \
 	-Wl,--whole-archive \
 		$(u-boot-main) \
 		$(u-boot-keep-syms-lto) \
@@ -24,7 +24,7 @@ cmd_u-boot__ = $(CC) -o $@ -Wl,-T u-boot.lds $(u-boot-init) \
 	$(PLATFORM_LIBS) -Wl,-Map -Wl,u-boot.map
 
 cmd_u-boot-spl = (cd $(obj) && $(CC) -o $(SPL_BIN) -Wl,-T u-boot-spl.lds \
-	$(LTO_FINAL_LDFLAGS) \
+	$(KBUILD_LDFLAGS:%=-Wl,%) $(LTO_FINAL_LDFLAGS) \
 	$(patsubst $(obj)/%,%,$(u-boot-spl-init)) \
 	-Wl,--whole-archive \
 		$(patsubst $(obj)/%,%,$(u-boot-spl-main)) \

arch/sandbox/cpu/os.c

@@ -644,7 +644,7 @@ int os_get_filesize(const char *fname, long long *size)
 
 void os_putc(int ch)
 {
-	fputc(ch, stdout);
+	os_write(1, &ch, 1);
 }
 
 void os_puts(const char *str)

arch/sandbox/cpu/u-boot-spl.lds

@@ -8,7 +8,7 @@
 SECTIONS
 {
 
-	. = ALIGN(4);
+	. = ALIGN(32);
 	.u_boot_list : {
 		KEEP(*(SORT(.u_boot_list*)));
 	}

arch/sandbox/cpu/u-boot.lds

@@ -8,7 +8,7 @@
 SECTIONS
 {
 
-	. = ALIGN(4);
+	. = ALIGN(32);
 	.u_boot_list : {
 		KEEP(*(SORT(.u_boot_list*)));
 	}

config.mk

@@ -12,7 +12,6 @@
 #  If we did not have Tegra SoCs, build system would be much simpler...)
 PLATFORM_RELFLAGS :=
 PLATFORM_CPPFLAGS :=
-KBUILD_LDFLAGS :=
 LDFLAGS_FINAL :=
 LDFLAGS_STANDALONE :=
 OBJCOPYFLAGS :=

drivers/core/Makefile

@@ -4,7 +4,7 @@
 
 obj-y	+= device.o fdtaddr.o lists.o root.o uclass.o util.o tag.o
 obj-$(CONFIG_$(SPL_TPL_)ACPIGEN) += acpi.o
-obj-$(CONFIG_DEVRES) += devres.o
+obj-$(CONFIG_$(SPL_TPL_)DEVRES) += devres.o
 obj-$(CONFIG_$(SPL_)DM_DEVICE_REMOVE)	+= device-remove.o
 obj-$(CONFIG_$(SPL_)SIMPLE_BUS)	+= simple-bus.o
 obj-$(CONFIG_SIMPLE_PM_BUS)	+= simple-pm-bus.o

drivers/core/device.c

@@ -68,7 +68,7 @@ static int device_bind_common(struct udevice *parent, const struct driver *drv,
 	INIT_LIST_HEAD(&dev->sibling_node);
 	INIT_LIST_HEAD(&dev->child_head);
 	INIT_LIST_HEAD(&dev->uclass_node);
-#ifdef CONFIG_DEVRES
+#if CONFIG_IS_ENABLED(DEVRES)
 	INIT_LIST_HEAD(&dev->devres_head);
 #endif
 	dev_set_plat(dev, plat);
@@ -1186,7 +1186,8 @@ int dev_enable_by_path(const char *path)
 static struct udevice_rt *dev_get_rt(const struct udevice *dev)
 {
 	struct udevice *base = ll_entry_start(struct udevice, udevice);
-	int idx = dev - base;
+	uint each_size = dm_udevice_size();
+	int idx = ((void *)dev - (void *)base) / each_size;
 
 	struct udevice_rt *urt = gd_dm_udevice_rt() + idx;
 

drivers/core/root.c

@@ -136,12 +136,18 @@ static int dm_setup_inst(void)
 
 	if (CONFIG_IS_ENABLED(OF_PLATDATA_RT)) {
 		struct udevice_rt *urt;
+		void *start, *end;
+		int each_size;
 		void *base;
 		int n_ents;
 		uint size;
 
 		/* Allocate the udevice_rt table */
-		n_ents = ll_entry_count(struct udevice, udevice);
+		each_size = dm_udevice_size();
+		start = ll_entry_start(struct udevice, udevice);
+		end = ll_entry_end(struct udevice, udevice);
+		size = end - start;
+		n_ents = size / each_size;
 		urt = calloc(n_ents, sizeof(struct udevice_rt));
 		if (!urt)
 			return log_msg_ret("urt", -ENOMEM);

include/dm/device-internal.h

@@ -397,7 +397,7 @@ fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr);
 #define DM_UCLASS_ROOT_S_NON_CONST	(((gd_t *)gd)->uclass_root_s)
 
 /* device resource management */
-#ifdef CONFIG_DEVRES
+#if CONFIG_IS_ENABLED(DEVRES)
 
 /**
  * devres_release_probe - Release managed resources allocated after probing
@@ -417,7 +417,7 @@ void devres_release_probe(struct udevice *dev);
  */
 void devres_release_all(struct udevice *dev);
 
-#else /* ! CONFIG_DEVRES */
+#else /* ! DEVRES */
 
 static inline void devres_release_probe(struct udevice *dev)
 {
@@ -427,7 +427,7 @@ static inline void devres_release_all(struct udevice *dev)
 {
 }
 
-#endif /* ! CONFIG_DEVRES */
+#endif /* DEVRES */
 
 static inline int device_notify(const struct udevice *dev, enum event_t type)
 {

include/dm/device.h

@@ -184,7 +184,7 @@ struct udevice {
 #if CONFIG_IS_ENABLED(OF_REAL)
 	ofnode node_;
 #endif
-#ifdef CONFIG_DEVRES
+#if CONFIG_IS_ENABLED(DEVRES)
 	struct list_head devres_head;
 #endif
 #if CONFIG_IS_ENABLED(DM_DMA)
@@ -192,6 +192,14 @@ struct udevice {
 #endif
 };
 
+static inline int dm_udevice_size(void)
+{
+	if (CONFIG_IS_ENABLED(OF_PLATDATA_RT))
+		return ALIGN(sizeof(struct udevice), CONFIG_LINKER_LIST_ALIGN);
+
+	return sizeof(struct udevice);
+}
+
 /**
  * struct udevice_rt - runtime information set up by U-Boot
  *

include/dm/devres.h

@@ -30,7 +30,7 @@ struct devres_stats {
 	int total_size;
 };
 
-#ifdef CONFIG_DEVRES
+#if CONFIG_IS_ENABLED(DEVRES)
 
 #ifdef CONFIG_DEBUG_DEVRES
 void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
@@ -207,7 +207,7 @@ void devm_kfree(struct udevice *dev, void *ptr);
 /* Get basic stats on allocations */
 void devres_get_stats(const struct udevice *dev, struct devres_stats *stats);
 
-#else /* ! CONFIG_DEVRES */
+#else /* ! DEVRES */
 
 static inline void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp)
 {

test/dm/Makefile

@@ -32,7 +32,7 @@ obj-$(CONFIG_CLK) += clk.o clk_ccf.o
 obj-$(CONFIG_CPU) += cpu.o
 obj-$(CONFIG_CROS_EC) += cros_ec.o
 obj-$(CONFIG_PWM_CROS_EC) += cros_ec_pwm.o
-obj-$(CONFIG_DEVRES) += devres.o
+obj-$(CONFIG_$(SPL_TPL_)DEVRES) += devres.o
 obj-$(CONFIG_DMA) += dma.o
 obj-$(CONFIG_VIDEO_MIPI_DSI) += dsi_host.o
 obj-$(CONFIG_DM_DSA) += dsa.o