Re: [Qemu-devel] [PATCH v2 29/33] mips_malta: Setup GT64120 BARs in nanoMIPS bootloader

[Aleksandar Markovic]

> Subject: [PATCH v2 29/33] mips_malta: Setup GT64120 BARs in nanoMIPS 
> bootloader
>
> From: Paul Burton <address@hidden>
>
> Setup the GT64120 BARs in the nanoMIPS bootloader, in the same way that
> they are setup in the MIPS32 bootloader. This is necessary for Linux to
> be able to access peripherals, including the UART.
>
> Signed-off-by: Paul Burton <address@hidden>
> Signed-off-by: Yongbok Kim <address@hidden>
> Signed-off-by: Aleksandar Markovic <address@hidden>
> Signed-off-by: Stefan Markovic <address@hidden>
> ---
>  hw/mips/mips_malta.c | 73 
> ++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 73 insertions(+)
>

Reviewed-by: Aleksandar Markovic <address@hidden>

> diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
> index 4bc9036..d1a7c1f 100644
> --- a/hw/mips/mips_malta.c
> +++ b/hw/mips/mips_malta.c
> @@ -664,6 +664,79 @@ static void write_bootloader_nanomips(uint8_t *base, 
> int64_t run_addr,
>                                  /* lui a3,%hi(loaderparams.ram_low_size) */
>      stw_p(p++, 0x80e7); stw_p(p++, NM_LO(loaderparams.ram_low_size));
>                                  /* ori a3,a3,%lo(loaderparams.ram_low_size) 
> */
> +
> +    /* Load BAR registers as done by YAMON */
> +    stw_p(p++, 0xe040); stw_p(p++, 0x0681);
> +                                /* lui t1, %hi(0xb4000000) */
> +#ifdef TARGET_WORDS_BIGENDIAN
> +    stw_p(p++, 0xe020); stw_p(p++, 0x0be1);
> +                                /* lui t0, %hi(0xdf000000) */
> +#else
> +    stw_p(p++, 0x0020); stw_p(p++, 0x00df);
> +                                /* addiu[32] t0, $0, 0xdf */
> +#endif
> +    stw_p(p++, 0x8422); stw_p(p++, 0x9068);
> +                                /* sw t0, 0x68(t1) */
> +
> +    stw_p(p++, 0xe040); stw_p(p++, 0x077d);
> +                                /* lui t1, %hi(0xbbe00000) */
> +#ifdef TARGET_WORDS_BIGENDIAN
> +    stw_p(p++, 0xe020); stw_p(p++, 0x0801);
> +                                /* lui t0, %hi(0xc0000000) */
> +#else
> +    stw_p(p++, 0x0020); stw_p(p++, 0x00c0);
> +                                /* addiu[32] t0, $0, 0xc0 */
> +#endif
> +    stw_p(p++, 0x8422); stw_p(p++, 0x9048);
> +                                /* sw t0, 0x48(t1) */
> +#ifdef TARGET_WORDS_BIGENDIAN
> +    stw_p(p++, 0xe020); stw_p(p++, 0x0800);
> +                                /* lui t0, %hi(0x40000000) */
> +#else
> +    stw_p(p++, 0x0020); stw_p(p++, 0x0040);
> +                                /* addiu[32] t0, $0, 0x40 */
> +#endif
> +    stw_p(p++, 0x8422); stw_p(p++, 0x9050);
> +                                /* sw t0, 0x50(t1) */
> +
> +#ifdef TARGET_WORDS_BIGENDIAN
> +    stw_p(p++, 0xe020); stw_p(p++, 0x0001);
> +                                /* lui t0, %hi(0x80000000) */
> +#else
> +    stw_p(p++, 0x0020); stw_p(p++, 0x0080);
> +                                /* addiu[32] t0, $0, 0x80 */
> +#endif
> +    stw_p(p++, 0x8422); stw_p(p++, 0x9058);
> +                                /* sw t0, 0x58(t1) */
> +#ifdef TARGET_WORDS_BIGENDIAN
> +    stw_p(p++, 0xe020); stw_p(p++, 0x07e0);
> +                                /* lui t0, %hi(0x3f000000) */
> +#else
> +    stw_p(p++, 0x0020); stw_p(p++, 0x003f);
> +                                /* addiu[32] t0, $0, 0x3f */
> +#endif
> +    stw_p(p++, 0x8422); stw_p(p++, 0x9060);
> +                                /* sw t0, 0x60(t1) */
> +
> +#ifdef TARGET_WORDS_BIGENDIAN
> +    stw_p(p++, 0xe020); stw_p(p++, 0x0821);
> +                                /* lui t0, %hi(0xc1000000) */
> +#else
> +    stw_p(p++, 0x0020); stw_p(p++, 0x00c1);
> +                                /* addiu[32] t0, $0, 0xc1 */
> +#endif
> +    stw_p(p++, 0x8422); stw_p(p++, 0x9080);
> +                                /* sw t0, 0x80(t1) */
> +#ifdef TARGET_WORDS_BIGENDIAN
> +    stw_p(p++, 0xe020); stw_p(p++, 0x0bc0);
> +                                /* lui t0, %hi(0x5e000000) */
> +#else
> +    stw_p(p++, 0x0020); stw_p(p++, 0x005e);
> +                                /* addiu[32] t0, $0, 0x5e */
> +#endif
> +    stw_p(p++, 0x8422); stw_p(p++, 0x9088);
> +                                /* sw t0, 0x88(t1) */
> +
>      stw_p(p++, 0xe320 | NM_HI1(kernel_entry));
>      stw_p(p++, NM_HI2(kernel_entry));
>                                  /* lui t9,%hi(kernel_entry) */
> --
> 2.7.4
>
>