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Mon, 4 Dec 2023 15:56:49 -0600 From: Tanmay Shah To: CC: , Tanmay Shah Subject: [PATCH 2/4] mailbox: add el3 support only for zynqmp platform Date: Mon, 4 Dec 2023 13:56:18 -0800 Message-ID: <20231204215620.63334-3-tanmay.shah@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231204215620.63334-1-tanmay.shah@amd.com> References: <20231204215620.63334-1-tanmay.shah@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002636B:EE_|SA0PR12MB4544:EE_ X-MS-Office365-Filtering-Correlation-Id: 9dac8b13-ed79-484b-a095-08dbf513eb4d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17; 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Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002636B.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4544 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.39 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.8 at phobos.denx.de X-Virus-Status: Clean If U-Boot is running in Exception Level 3 then use hardcode register values for mailbox message passing with PMU. This is only supported for zynqmp platform. Signed-off-by: Tanmay Shah --- drivers/mailbox/zynqmp-ipi.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/mailbox/zynqmp-ipi.c b/drivers/mailbox/zynqmp-ipi.c index acd0b287db..e76561f310 100644 --- a/drivers/mailbox/zynqmp-ipi.c +++ b/drivers/mailbox/zynqmp-ipi.c @@ -81,6 +81,7 @@ struct zynqmp_ipi { void __iomem *remote_res_regs; u32 remote_id; u32 local_id; + bool el3_supported; }; static int zynqmp_ipi_fw_call(struct zynqmp_ipi *ipi_mbox, @@ -115,6 +116,12 @@ static int zynqmp_ipi_send(struct mbox_chan *chan, const void *data) return ret; } + /* Return if EL3 is not supported */ + if (!zynqmp->el3_supported) { + dev_err(chan->dev, "mailbox in EL3 only supported for zynqmp"); + return -EOPNOTSUPP; + } + /* Write trigger interrupt */ writel(IPI_BIT_MASK_PMU0, &ipi_int_apu->trig); @@ -159,6 +166,9 @@ static int zynqmp_ipi_probe(struct udevice *dev) debug("%s(dev=%p)\n", __func__, dev); + if (IS_ENABLED(CONFIG_SPL_BUILD) || of_machine_is_compatible("xlnx,zynqmp")) + zynqmp->el3_supported = true; + /* Get subnode where the regs are defined */ /* Note IPI mailbox node needs to be the first one in DT */ node = ofnode_first_subnode(dev_ofnode(dev));