sandbox: Allow ethernet to be disabled at runtime

For bootstd tests it is seldom useful to have ethernet enabled. Add a way
to disable it, so that ethernet operations like tftpboot do nothing.

Signed-off-by: Simon Glass <sjg@chromium.org>

3 files changed, 33 insertions, 0 deletions

diff --git a/arch/sandbox/cpu/state.c b/arch/sandbox/cpu/state.c
index dd7978cfce..267f280df1 100644
--- a/arch/sandbox/cpu/state.c
+++ b/arch/sandbox/cpu/state.c
@@ -12,6 +12,7 @@
 #include <os.h>
 #include <asm/malloc.h>
 #include <asm/state.h>
+#include <asm/test.h>
 
 /* Main state record for the sandbox */
 static struct sandbox_state main_state;
@@ -366,6 +367,7 @@ void state_reset_for_test(struct sandbox_state *state)
 	state->sysreset_allowed[SYSRESET_POWER_OFF] = true;
 	state->sysreset_allowed[SYSRESET_COLD] = true;
 	state->allow_memio = false;
+	sandbox_set_eth_enable(true);
 
 	memset(&state->wdt, '\0', sizeof(state->wdt));
 	memset(state->spi, '\0', sizeof(state->spi));
@@ -444,6 +446,20 @@ int state_load_other_fdt(const char **bufp, int *sizep)
 	return 0;
 }
 
+void sandbox_set_eth_enable(bool enable)
+{
+	struct sandbox_state *state = state_get_current();
+
+	state->disable_eth = !enable;
+}
+
+bool sandbox_eth_enabled(void)
+{
+	struct sandbox_state *state = state_get_current();
+
+	return !state->disable_eth;
+}
+
 int state_init(void)
 {
 	state = &main_state;
diff --git a/arch/sandbox/include/asm/state.h b/arch/sandbox/include/asm/state.h
index 49ea483d33..f125fb87af 100644
--- a/arch/sandbox/include/asm/state.h
+++ b/arch/sandbox/include/asm/state.h
@@ -96,6 +96,7 @@ struct sandbox_state {
 	const char *select_unittests;	/* Unit test to run */
 	bool handle_signals;		/* Handle signals within sandbox */
 	bool autoboot_keyed;		/* Use keyed-autoboot feature */
+	bool disable_eth;		/* Disable Ethernet devices */
 
 	/* Pointer to information for each SPI bus/cs */
 	struct sandbox_spi_info spi[CONFIG_SANDBOX_SPI_MAX_BUS]
diff --git a/arch/sandbox/include/asm/test.h b/arch/sandbox/include/asm/test.h
index 568738c16d..1c522e38f3 100644
--- a/arch/sandbox/include/asm/test.h
+++ b/arch/sandbox/include/asm/test.h
@@ -344,4 +344,20 @@ void sandbox_set_fake_efi_mgr_dev(struct udevice *dev, bool fake_dev);
  */
 int sandbox_load_other_fdt(void **fdtp, int *sizep);
 
+/**
+ * sandbox_set_eth_enable() - Enable / disable Ethernet
+ *
+ * Allows control of whether Ethernet packets are actually send/received
+ *
+ * @enable: true to enable Ethernet, false to disable
+ */
+void sandbox_set_eth_enable(bool enable);
+
+/**
+ * sandbox_eth_enabled() - Check if Ethernet is enabled
+ *
+ * Returns: true if Ethernet is enabled on sandbox, False if not
+ */
+bool sandbox_eth_enabled(void);
+
 #endif