console: Add a console buffer
It is useful to be able to record console output and provide console input
via a buffer. This provides sandbox with the ability to run a command and
check its output. If the console is set to silent then no visible output
is generated.
This also provides a means to fix the problem where tests produce unwanted
output, such as errors or warnings. This can be confusing. We can instead
set the console to silent and record this output. It can be checked later
in the test if required.
It is possible that this may prove useful for non-test situations. For
example the console output may be suppressed for normal operations, but
recorded and stored for access by the OS. That feature is not implemented
at present.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/Kconfig b/common/Kconfig
index 620d41f..ccf5475 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -679,3 +679,31 @@
endmenu
endmenu
+
+config CONSOLE_RECORD
+ bool "Console recording"
+ help
+ This provides a way to record console output (and provide console
+ input) through cirular buffers. This is mostly useful for testing.
+ Console output is recorded even when the console is silent.
+ To enable console recording, call console_record_reset_enable()
+ from your code.
+
+config CONSOLE_RECORD_OUT_SIZE
+ hex "Output buffer size"
+ depends on CONSOLE_RECORD
+ default 0x400 if CONSOLE_RECORD
+ help
+ Set the size of the console output buffer. When this fills up, no
+ more data will be recorded until some is removed. The buffer is
+ allocated immediately after the malloc() region is ready.
+
+config CONSOLE_RECORD_IN_SIZE
+ hex "Input buffer size"
+ depends on CONSOLE_RECORD
+ default 0x100 if CONSOLE_RECORD
+ help
+ Set the size of the console input buffer. When this contains data,
+ tstc() and getc() will use this in preference to real device input.
+ The buffer is allocated immediately after the malloc() region is
+ ready.
diff --git a/common/board_f.c b/common/board_f.c
index 09baa5c..b035c90 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -737,6 +737,15 @@
return 0;
}
+static int initf_console_record(void)
+{
+#if defined(CONFIG_CONSOLE_RECORD) && defined(CONFIG_SYS_MALLOC_F_LEN)
+ return console_record_init();
+#else
+ return 0;
+#endif
+}
+
static int initf_dm(void)
{
#if defined(CONFIG_DM) && defined(CONFIG_SYS_MALLOC_F_LEN)
@@ -773,6 +782,7 @@
trace_early_init,
#endif
initf_malloc,
+ initf_console_record,
#if defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx)
/* TODO: can this go into arch_cpu_init()? */
probecpu,
diff --git a/common/board_r.c b/common/board_r.c
index 85aef95..f7118e8 100644
--- a/common/board_r.c
+++ b/common/board_r.c
@@ -280,6 +280,15 @@
return 0;
}
+static int initr_console_record(void)
+{
+#if defined(CONFIG_CONSOLE_RECORD)
+ return console_record_init();
+#else
+ return 0;
+#endif
+}
+
#ifdef CONFIG_SYS_NONCACHED_MEMORY
static int initr_noncached(void)
{
@@ -731,6 +740,7 @@
#endif
initr_barrier,
initr_malloc,
+ initr_console_record,
#ifdef CONFIG_SYS_NONCACHED_MEMORY
initr_noncached,
#endif
diff --git a/common/console.c b/common/console.c
index 10972b0..b3f126c 100644
--- a/common/console.c
+++ b/common/console.c
@@ -378,6 +378,15 @@
if (!gd->have_console)
return 0;
+#ifdef CONFIG_CONSOLE_RECORD
+ if (gd->console_in.start) {
+ int ch;
+
+ ch = membuff_getbyte(&gd->console_in);
+ if (ch != -1)
+ return 1;
+ }
+#endif
if (gd->flags & GD_FLG_DEVINIT) {
/* Get from the standard input */
return fgetc(stdin);
@@ -396,7 +405,12 @@
if (!gd->have_console)
return 0;
-
+#ifdef CONFIG_CONSOLE_RECORD
+ if (gd->console_in.start) {
+ if (membuff_peekbyte(&gd->console_in) != -1)
+ return 1;
+ }
+#endif
if (gd->flags & GD_FLG_DEVINIT) {
/* Test the standard input */
return ftstc(stdin);
@@ -470,6 +484,10 @@
return;
}
#endif
+#ifdef CONFIG_CONSOLE_RECORD
+ if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
+ membuff_putbyte(&gd->console_out, c);
+#endif
#ifdef CONFIG_SILENT_CONSOLE
if (gd->flags & GD_FLG_SILENT)
return;
@@ -513,6 +531,10 @@
return;
}
#endif
+#ifdef CONFIG_CONSOLE_RECORD
+ if (gd && (gd->flags & GD_FLG_RECORD) && gd->console_out.start)
+ membuff_put(&gd->console_out, s, strlen(s));
+#endif
#ifdef CONFIG_SILENT_CONSOLE
if (gd->flags & GD_FLG_SILENT)
return;
@@ -575,6 +597,32 @@
return i;
}
+#ifdef CONFIG_CONSOLE_RECORD
+int console_record_init(void)
+{
+ int ret;
+
+ ret = membuff_new(&gd->console_out, CONFIG_CONSOLE_RECORD_OUT_SIZE);
+ if (ret)
+ return ret;
+ ret = membuff_new(&gd->console_in, CONFIG_CONSOLE_RECORD_IN_SIZE);
+
+ return ret;
+}
+
+void console_record_reset(void)
+{
+ membuff_purge(&gd->console_out);
+ membuff_purge(&gd->console_in);
+}
+
+void console_record_reset_enable(void)
+{
+ console_record_reset();
+ gd->flags |= GD_FLG_RECORD;
+}
+#endif
+
/* test if ctrl-c was pressed */
static int ctrlc_disabled = 0; /* see disable_ctrl() */
static int ctrlc_was_pressed = 0;
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index d0383f3..1abdcaa 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -21,6 +21,7 @@
*/
#ifndef __ASSEMBLY__
+#include <membuff.h>
#include <linux/list.h>
typedef struct global_data {
@@ -103,6 +104,10 @@
#endif
struct udevice *cur_serial_dev; /* current serial device */
struct arch_global_data arch; /* architecture-specific data */
+#ifdef CONFIG_CONSOLE_RECORD
+ struct membuff console_out; /* console output */
+ struct membuff console_in; /* console input */
+#endif
} gd_t;
#endif
@@ -121,5 +126,6 @@
#define GD_FLG_FULL_MALLOC_INIT 0x00200 /* Full malloc() is ready */
#define GD_FLG_SPL_INIT 0x00400 /* spl_init() has been called */
#define GD_FLG_SKIP_RELOC 0x00800 /* Don't relocate */
+#define GD_FLG_RECORD 0x01000 /* Record console */
#endif /* __ASM_GENERIC_GBL_DATA_H */
diff --git a/include/console.h b/include/console.h
index 097518d..3d37f6a 100644
--- a/include/console.h
+++ b/include/console.h
@@ -20,6 +20,28 @@
int disable_ctrlc(int); /* 1 to disable, 0 to enable Control-C detect */
int confirm_yesno(void); /* 1 if input is "y", "Y", "yes" or "YES" */
+/**
+ * console_record_init() - set up the console recording buffers
+ *
+ * This should be called as soon as malloc() is available so that the maximum
+ * amount of console output can be recorded.
+ */
+int console_record_init(void);
+
+/**
+ * console_record_reset() - reset the console recording buffers
+ *
+ * Removes any data in the buffers
+ */
+void console_record_reset(void);
+
+/**
+ * console_record_reset_enable() - reset and enable the console buffers
+ *
+ * This should be called to enable the console buffer.
+ */
+void console_record_reset_enable(void);
+
/*
* CONSOLE multiplexing.
*/