From: Helge Deller <deller@gmx.de>
To: Richard Henderson <richard.henderson@linaro.org>, qemu-devel@nongnu.org
Cc: Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH 4/7] hw/hppa: Inform SeaBIOS about fw_cfg port address
Date: Wed, 2 Sep 2020 13:24:47 +0200 [thread overview]
Message-ID: <a56b96b3-9afc-0708-27bf-97d8095bde07@gmx.de> (raw)
In-Reply-To: <6385bd44-9cf8-95c3-1e59-0e1fb209863f@linaro.org>
On 01.09.20 23:39, Richard Henderson wrote:
> On 9/1/20 11:34 AM, Helge Deller wrote:
>> -/* QEMU fw_cfg interface port */
>> -#define QEMU_FW_CFG_IO_BASE (MEMORY_HPA + 0x80)
>> +#define FW_CFG_IO_BASE 0xfffa0000
>
> Why is this value changing?
Devices on hppa occupy at least 4k starting at the HPA,
so MEMORY_HPA+4k is blocked (by Linux) for the memory module.
I noticed this when testing the new Linux kernel patch to
let the fw_cfg entries show up in Linux under /proc:
https://patchwork.kernel.org/patch/11715133/
The Linux kernel driver could not allocate the region for fw_cfg.
This new base address seems to not conflict.
Helge
next prev parent reply other threads:[~2020-09-02 11:28 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-01 18:34 [PATCH 0/7] hppa power button support, graphics updates and firmware fixes Helge Deller
2020-09-01 18:34 ` [PATCH 1/7] seabios-hppa: Update SeaBIOS to hppa-qemu-5.2-2 tag Helge Deller
2020-09-01 18:34 ` [PATCH 2/7] hw/hppa: Make number of TLB and BTLB entries configurable Helge Deller
2020-09-01 21:36 ` Richard Henderson
2020-09-02 11:16 ` Helge Deller
2020-09-02 16:52 ` Richard Henderson
2020-09-02 19:36 ` Helge Deller
2020-09-01 18:34 ` [PATCH 3/7] hw/hppa: Store boot device in fw_cfg section Helge Deller
2020-09-01 21:37 ` Richard Henderson
2020-09-01 18:34 ` [PATCH 4/7] hw/hppa: Inform SeaBIOS about fw_cfg port address Helge Deller
2020-09-01 21:39 ` Richard Henderson
2020-09-02 11:24 ` Helge Deller [this message]
2020-09-02 16:46 ` Richard Henderson
2020-09-02 19:37 ` Helge Deller
2020-09-01 18:34 ` [PATCH 5/7] hw/hppa: Add power button emulation Helge Deller
2020-09-01 21:42 ` Richard Henderson
2020-09-01 18:34 ` [PATCH 6/7] hw/display/artist: Fix artist screen resolution Helge Deller
2020-09-01 21:49 ` Richard Henderson
2020-09-02 21:48 ` Helge Deller
2020-09-02 22:09 ` Richard Henderson
2020-09-03 6:07 ` Helge Deller
2020-09-03 6:08 ` Helge Deller
2020-09-03 6:09 ` Helge Deller
2020-09-03 15:09 ` Richard Henderson
2020-09-01 18:34 ` [PATCH 7/7] target/hppa: Fix boot with old Linux installation CDs Helge Deller
2020-09-01 19:37 ` [PATCH 0/7] hppa power button support, graphics updates and firmware fixes Philippe Mathieu-Daudé
2020-09-01 19:49 ` Helge Deller
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