[Skiboot] [PATCH] core/console.c: Make skiboot fun again

[Cyril Bur]

On Fri, 2017-12-08 at 13:28 +1100, Alistair Popple wrote:
>          ,_         _,
>          |\\.-"""-.//|
>          \`         `/
>         /    _   _    \
>         |    a _ a    |
>         '.=    Y    =.'
>           >._  ^  _.<
>          /   `````   \
>          )           (
>         ,(           ),
>        / )   /   \   ( \
>        ) (   )   (   ) (
>        ( )   (   )   ( )
>        )_(   )   (   )_(-.._
>       (  )_  (._.)  _(  )_, `\
>        ``(   )   (   )`` .' .'
>     jgs   ```     ```   ( (`
>                          '-'
> 
> Skiboot output is pretty dull to look at. Sometimes surprises are nice.
> Especially when they are comforting cats. Even more so when they are
> rainbow coloured cats. Lol.
> 
> Signed-off-by: Alistair Popple <alistair at popple.id.au>

Needs-more-bikeshed-by: Cyril Bur <cyril.bur at au1.ibm.com>

> ---
>  core/console.c            | 62 +++++++++++++++++++++++++++++++++++++++++++++++
>  core/init.c               |  4 +++
>  include/skiboot.h         |  3 +++
>  platforms/astbmc/common.c |  5 ++++
>  4 files changed, 74 insertions(+)
> 
> diff --git a/core/console.c b/core/console.c
> index b9129c9f..9c344e9e 100644
> --- a/core/console.c
> +++ b/core/console.c
> @@ -235,6 +235,39 @@ static void write_char(char c)
>  	inmem_write(c);
>  }
>  
> +int sine_table[] = {
> +	0x80,0x83,0x86,0x8a,0x8d,0x90,0x93,0x97,
> +	0x9a,0x9d,0xa0,0xa4,0xa7,0xaa,0xad,0xb0,
> +	0xb3,0xb6,0xb9,0xbc,0xbf,0xc2,0xc5,0xc8,
> +	0xca,0xcd,0xd0,0xd2,0xd5,0xd7,0xda,0xdc,
> +	0xde,0xe0,0xe3,0xe5,0xe7,0xe9,0xea,0xec,
> +	0xee,0xf0,0xf1,0xf3,0xf4,0xf5,0xf7,0xf8,
> +	0xf9,0xfa,0xfb,0xfb,0xfc,0xfd,0xfd,0xfe,
> +	0xfe,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
> +	0xfe,0xfe,0xfd,0xfd,0xfc,0xfb,0xfb,0xfa,
> +	0xf9,0xf8,0xf7,0xf5,0xf4,0xf3,0xf1,0xf0,
> +	0xee,0xec,0xea,0xe9,0xe7,0xe5,0xe3,0xe0,
> +	0xde,0xdc,0xda,0xd7,0xd5,0xd2,0xd0,0xcd,
> +	0xca,0xc8,0xc5,0xc2,0xbf,0xbc,0xb9,0xb6,
> +	0xb3,0xb0,0xad,0xaa,0xa7,0xa4,0xa0,0x9d,
> +	0x9a,0x97,0x93,0x90,0x8d,0x8a,0x86,0x83,
> +	0x80,0x7c,0x79,0x75,0x72,0x6f,0x6c,0x68,
> +	0x65,0x62,0x5f,0x5b,0x58,0x55,0x52,0x4f,
> +	0x4c,0x49,0x46,0x43,0x40,0x3d,0x3a,0x37,
> +	0x35,0x32,0x2f,0x2d,0x2a,0x28,0x25,0x23,
> +	0x21,0x1f,0x1c,0x1a,0x18,0x16,0x15,0x13,
> +	0x11,0xf,0xe,0xc,0xb,0xa,0x8,0x7,
> +	0x6,0x5,0x4,0x4,0x3,0x2,0x2,0x1,
> +	0x1,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
> +	0x1,0x1,0x2,0x2,0x3,0x4,0x4,0x5,
> +	0x6,0x7,0x8,0xa,0xb,0xc,0xe,0xf,
> +	0x11,0x13,0x15,0x16,0x18,0x1a,0x1c,0x1f,
> +	0x21,0x23,0x25,0x28,0x2a,0x2d,0x2f,0x32,
> +	0x35,0x37,0x3a,0x3d,0x40,0x43,0x46,0x49,
> +	0x4c,0x4f,0x52,0x55,0x58,0x5b,0x5f,0x62,
> +	0x65,0x68,0x6c,0x6f,0x72,0x75,0x79,0x7c };
> +
> +int lolcat = 0;
>  ssize_t console_write(bool flush_to_drivers, const void *buf, size_t count)
>  {
>  	/* We use recursive locking here as we can get called
> @@ -242,12 +275,41 @@ ssize_t console_write(bool flush_to_drivers, const void *buf, size_t count)
>  	 */
>  	bool need_unlock = lock_recursive(&con_lock);
>  	const char *cbuf = buf;
> +	char colour[30];
> +	const char *colour_end = "\x1b[0m";
> +	const char *cc;
> +	int red, green, blue;
> +	static int char_count = 0;
>  
>  	while(count--) {
>  		char c = *(cbuf++);
>  		if (c == '\n')
>  			write_char('\r');
> +
> +		if (lolcat) {
> +			red = sine_table[char_count];
> +			green = sine_table[(char_count + ARRAY_SIZE(sine_table)/3) % ARRAY_SIZE(sine_table)];
> +			blue = sine_table[(char_count + (2*ARRAY_SIZE(sine_table))/3) % ARRAY_SIZE(sine_table)];
> +
> +			snprintf(colour, ARRAY_SIZE(colour), "\x1b[38;2;%03d;%03d;%03dm", red, green, blue);
> +			cc = colour;
> +			while (*cc) {
> +				write_char(*cc);
> +				cc++;
> +			}
> +		}
> +
>  		write_char(c);
> +
> +		if (lolcat) {
> +			cc = colour_end;
> +			while (*cc) {
> +				write_char(*cc);
> +				cc++;
> +				char_count++;
> +				char_count %= ARRAY_SIZE(sine_table);
> +			}
> +		}
>  	}
>  
>  	__flush_console(flush_to_drivers);
> diff --git a/core/init.c b/core/init.c
> index 2eeba759..17c31118 100644
> --- a/core/init.c
> +++ b/core/init.c
> @@ -1002,6 +1002,10 @@ void __noreturn __nomcount main_cpu_entry(const void *fdt)
>  	/* Read in NVRAM and set it up */
>  	nvram_init();
>  
> +	/* Feeling colourful? */
> +	if (!lolcat)
> +		lolcat = !!nvram_query("lolcat");
> +
>  	/* preload the IMC catalog dtb */
>  	imc_catalog_preload();
>  
> diff --git a/include/skiboot.h b/include/skiboot.h
> index db913258..11914a67 100644
> --- a/include/skiboot.h
> +++ b/include/skiboot.h
> @@ -52,6 +52,9 @@ extern struct mem_region *mem_region_next(struct mem_region *region);
>  /* Readonly section start and end. */
>  extern char __rodata_start[], __rodata_end[];
>  
> +/* Enable lolcat mode */
> +extern int lolcat;
> +
>  static inline bool is_rodata(const void *p)
>  {
>  	return ((const char *)p >= __rodata_start && (const char *)p < __rodata_end);
> diff --git a/platforms/astbmc/common.c b/platforms/astbmc/common.c
> index 243ad946..9d6583b0 100644
> --- a/platforms/astbmc/common.c
> +++ b/platforms/astbmc/common.c
> @@ -26,6 +26,7 @@
>  #include <bt.h>
>  #include <errorlog.h>
>  #include <lpc.h>
> +#include <rtc.h>
>  
>  #include "astbmc.h"
>  
> @@ -120,6 +121,8 @@ static int astbmc_fru_init(void)
>  
>  void astbmc_init(void)
>  {
> +	struct tm tm;
> +
>  	/* Initialize PNOR/NVRAM */
>  	pnor_init();
>  
> @@ -131,6 +134,8 @@ void astbmc_init(void)
>  	ipmi_wdt_init();
>  	ipmi_rtc_init();
>  	ipmi_opal_init();
> +	while (rtc_cache_get(&tm)) opal_run_pollers();
> +	lolcat = tm.tm_mon == 11 && tm.tm_mday == 7 && tm.tm_hour == 17 && tm.tm_min == 58;
>  	astbmc_fru_init();
>  	ipmi_sensor_init();
>