From: sudeep.holla@arm•com (Sudeep Holla)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCH v2 02/18] ARM64 / ACPI: Get RSDP and ACPI boot-time tables
Date: Tue, 19 Aug 2014 10:47:00 +0100 [thread overview]
Message-ID: <53F31D14.70006@arm.com> (raw)
In-Reply-To: <53F31A6D.5090104@linaro.org>
On 19/08/14 10:35, Hanjun Guo wrote:
> On 2014-8-19 2:30, Sudeep Holla wrote:
>> On 04/08/14 16:28, Hanjun Guo wrote:
>>> From: Al Stone <al.stone@linaro•org>
>>>
>>> As we want to get ACPI tables to parse and then use the information
>>> for system initialization, we should get the RSDP (Root System
>>> Description Pointer) first, it then locates Extended Root Description
>>> Table (XSDT) which contains all the 64-bit physical address that
>>> pointer to other boot-time tables.
>>>
>>> Introduce acpi.c and its related head file in this patch to provide
>>> fundamental needs of extern variables and functions for ACPI core,
>>> and then get boot-time tables as needed.
>>> - asm/cpu.h need for ACPI core and will be updated in the future to
>>> add definitions for arch_(un)register_cpu which are required for
>>> ACPI based physical CPU hotplug;
>>
[...]
>>> +/*
>>> + * acpi_boot_table_init() called from setup_arch(), always.
>>> + * 1. find RSDP and get its address, and then find XSDT
>>> + * 2. extract all tables and checksums them all
>>> + *
>>> + * We can parse ACPI boot-time tables such as FADT, MADT after
>>> + * this function is called.
>>> + */
>>> +void __init acpi_boot_table_init(void)
>>> +{
>>> + /* If acpi_disabled, bail out */
>>> + if (acpi_disabled)
>>> + return;
>>> +
>>> + /* Initialize the ACPI boot-time table parser. */
>>> + if (acpi_table_init()) {
>>
>> Can't we call acpi_table_init directly in setup ?
>> IIUC x86 has acpi_boot_table_init as it parses Boot Flags
>> table(ACPI_SIG_BOOT)
>
> Yes, we can. But I think it not a big deal to dot that, if that
> makes the code more readable, I will update it.
>
I agree, but I actually wanted to check if we ever have to use/parse
Simple Boot Flag Table on ARM64 which is reserved but not part of ACPI
spec. I assume x86 use either for Legacy reason or firmware expects it.
Regards,
Sudeep
next prev parent reply other threads:[~2014-08-19 9:47 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-04 15:28 [PATCH v2 00/18] Introduce ACPI for ARM64 based on ACPI 5.1 Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 01/18] ARM64: Move the init of cpu_logical_map(0) before unflatten_device_tree() Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 02/18] ARM64 / ACPI: Get RSDP and ACPI boot-time tables Hanjun Guo
2014-08-18 18:30 ` Sudeep Holla
2014-08-19 9:35 ` Hanjun Guo
2014-08-19 9:47 ` Sudeep Holla [this message]
2014-08-04 15:28 ` [PATCH v2 03/18] ARM64 / ACPI: Introduce lowlevel suspend function Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 04/18] ARM64 / ACPI: Make PCI optional for ACPI on ARM64 Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 05/18] ARM64 / ACPI: Parse FADT table to get PSCI flags for PSCI init Hanjun Guo
2014-08-18 14:27 ` Catalin Marinas
2014-08-19 3:50 ` Hanjun Guo
2014-08-19 11:10 ` Mark Rutland
2014-08-19 12:13 ` Hanjun Guo
2014-08-19 22:55 ` Moore, Robert
2014-08-20 4:12 ` Hanjun Guo
2014-08-18 18:32 ` Sudeep Holla
2014-08-19 10:39 ` Hanjun Guo
2014-08-19 11:07 ` Sudeep Holla
2014-08-04 15:28 ` [PATCH v2 06/18] ARM64 / ACPI: Parse MADT to map logical cpu to MPIDR and get cpu_possible/present_map Hanjun Guo
2014-08-18 14:27 ` Catalin Marinas
2014-08-19 7:36 ` Hanjun Guo
2014-08-20 14:38 ` Catalin Marinas
2014-08-21 2:51 ` Hanjun Guo
2014-08-18 18:33 ` Sudeep Holla
2014-08-19 11:00 ` Hanjun Guo
2014-08-19 16:46 ` [Linaro-acpi] " Zi Shen Lim
2014-08-20 3:24 ` Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 07/18] ACPI / table: Print GIC information when MADT is parsed Hanjun Guo
2014-08-07 1:41 ` Zheng, Lv
2014-08-07 10:28 ` Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 08/18] ARM64 / ACPI: Get the enable method for SMP initialization in ACPI way Hanjun Guo
2014-08-18 14:27 ` Catalin Marinas
2014-08-19 8:32 ` Hanjun Guo
2014-08-20 14:52 ` Catalin Marinas
2014-08-21 3:06 ` Hanjun Guo
2014-08-18 18:34 ` Sudeep Holla
2014-08-19 11:26 ` Hanjun Guo
2014-08-18 18:56 ` Geoff Levand
2014-08-19 12:11 ` Hanjun Guo
2014-08-19 19:25 ` Geoff Levand
2014-08-20 3:25 ` Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 09/18] ACPI / processor: Make it possible to get CPU hardware ID via GICC Hanjun Guo
2014-08-18 14:27 ` Catalin Marinas
2014-08-19 8:37 ` Hanjun Guo
2014-08-20 14:56 ` Catalin Marinas
2014-08-21 3:25 ` Hanjun Guo
2014-08-18 18:34 ` Sudeep Holla
2014-08-19 11:29 ` Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 10/18] ARM64 / ACPI: Introduce ACPI_IRQ_MODEL_GIC and register device's gsi Hanjun Guo
2014-08-18 18:34 ` Sudeep Holla
2014-08-19 11:36 ` Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 11/18] ACPI / table: Add new function to get table entries Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 12/18] ARM64 / ACPI: Add GICv2 specific ACPI boot support Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 13/18] ARM64 / ACPI: Parse GTDT to initialize arch timer Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 14/18] ARM64 / ACPI: Select ACPI_REDUCED_HARDWARE_ONLY if ACPI is enabled on ARM64 Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 15/18] ARM64 / ACPI: Introduce early_param for "acpi" and set ACPI default off Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 16/18] ARM64 / ACPI: If we chose to boot from acpi then disable FDT Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 17/18] ARM64 / ACPI: Enable ARM64 in Kconfig Hanjun Guo
2014-08-18 14:27 ` Catalin Marinas
2014-08-19 8:38 ` Hanjun Guo
2014-08-04 15:28 ` [PATCH v2 18/18] Documentation: ACPI for ARM64 Hanjun Guo
2014-08-04 20:48 ` Randy Dunlap
2014-08-05 3:36 ` Hanjun Guo
[not found] ` <CAJRNFK+UfJhGR65tOecy=X+YdHQHiNPZ4p_p8LUxhRL3GW5gFw@mail.gmail.com>
2014-08-05 3:34 ` [Linaro-acpi] [PATCH v2 00/18] Introduce ACPI for ARM64 based on ACPI 5.1 Hanjun Guo
2014-08-18 17:08 ` Alexander Spyridakis
2014-08-18 18:11 ` Graeme Gregory
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