[OpenBIOS] [PATCH] libopenbios: add Forth LE memory access words

[Mark Cave-Ayland]

On 10/06/17 14:22, Mark Cave-Ayland wrote:

> These are particularly useful when accessing hardware registers from BE hosts.
> 
> Signed-off-by: Mark Cave-Ayland <mark.cave-ayland at ilande.co.uk>
> ---
>  libopenbios/init.c |   50 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 50 insertions(+)
> 
> diff --git a/libopenbios/init.c b/libopenbios/init.c
> index aa99608..3ad9505 100644
> --- a/libopenbios/init.c
> +++ b/libopenbios/init.c
> @@ -15,12 +15,56 @@
>   */
>  
>  #include "config.h"
> +#include "libc/byteorder.h"
>  #include "libopenbios/openbios.h"
>  #include "libopenbios/bindings.h"
>  #include "libopenbios/initprogram.h"
>  #define NO_QEMU_PROTOS
>  #include "arch/common/fw_cfg.h"
>  
> +
> +/*
> + *  le-w!          ( w waddr -- )
> + */
> +
> +static void lewstore(void)
> +{
> +	u16 *aaddr = (u16 *)cell2pointer(POP());
> +	const u16 word = POP();
> +	*aaddr = __cpu_to_le16(word);
> +}
> +
> +/*
> + *  le-l!          ( quad qaddr -- )
> + */
> +
> +static void lelstore(void)
> +{
> +	u32 *aaddr = (u32 *)cell2pointer(POP());
> +	const u32 longval = POP();
> +	*aaddr = __cpu_to_le32(longval);
> +}
> +
> +/*
> + *  le-w@          ( waddr -- w )
> + */
> +
> +static void lewfetch(void)
> +{
> +	const u16 *aaddr = (u16 *)cell2pointer(POP());
> +	PUSH(__le16_to_cpu(*aaddr));
> +}
> +
> +/*
> + *  le-l@          ( qaddr -- quad )
> + */
> +
> +static void lelfetch(void)
> +{
> +	const u32 *aaddr = (u32 *)cell2pointer(POP());
> +	PUSH(__le32_to_cpu(*aaddr));
> +}
> +
>  void
>  openbios_init( void )
>  {
> @@ -36,4 +80,10 @@ openbios_init( void )
>  	
>  	// Bind the C implementation of (go) into Forth
>  	bind_func("(go)", go);
> +	
> +	// Bind the LE access words
> +	bind_func("le-w!", lewstore);
> +	bind_func("le-l!", lelstore);
> +	bind_func("le-w@", lewfetch);
> +	bind_func("le-l@", lelfetch);
>  }

No further comments, so I've applied this to master.


ATB,

Mark.