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client-ip=40.67.248.234; helo=nebula.arm.com; From: Penny Zheng To: , , CC: , , , , Subject: [PATCH V3 02/10] xen/arm: introduce new helper device_tree_get_meminfo Date: Thu, 15 Jul 2021 05:18:11 +0000 Message-ID: <20210715051819.3073628-3-penny.zheng@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210715051819.3073628-1-penny.zheng@arm.com> References: <20210715051819.3073628-1-penny.zheng@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 183d19f4-f280-48b6-2cad-08d9475001a7 X-MS-TrafficTypeDiagnostic: AM5PR0801MB1987:|DB8PR08MB4026: X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Oob-TLC-OOBClassifiers: OLM:580;OLM:580; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: fzOrV7tM06yzry1ig/XBIkBojH61BQmHn6rpxVnghWpYw5gZgR945/jeiMBGUlHEwia6O2LEw3TQS5Etcl85aOhZBSVIasa0p6f2m48zMxcojWpjzHGGkXx/qdRnwKJBVBceSdhd2rMPgfa1LkROBCtfjB4c1XNVMHaO2cCYaS0RqSRNqfrUZ8I8+xEOXKn+wc5T0r2L92CUnYsVmctsgnkfECPNjCCdWscTvisRlpWEpOApy9Ak/vs3H5bcsif1n/2iwuxH8zpcoDlJ1CkvmmPbvi0yseoIi0bT+YEVw4NW+QFuktY61dT/f5Yn9hQg2yGDmyzyiMcj47H+NHZEcDYzDm8CwKiucO9EzyhAqpvO9kuDp5zJ1WLFG8FNMCvLTB+eGcdCJhVeATwfH+Hk3dxtEwYj3BOZNqBxzQej1Q/oEhO/MzoThIEombiVq4VkCbmAf5CHpEx/jXsZmZJWWtIhdKfv1fR/iIpt7esUIA/U3i2hyBaPzIQVHWr9seYaKShaTG4BbDq3u8bY3fzU2/AfW02iTgLejE7N4GkA7dGMry201MtV68x9XD2F2JqJkQ3U2oTkdsStXyWXHSRFpYzz1ddEFdpS6n8rf9vZMhkhm9eMoJkw+dbJaBAtG5pCG5LkK1+F55EIONWZMZmV4shrlJ/m1kz+ZimJ7gEgjqP/QGGR0dEstgCLAWPLpdj3Ua3TM+oeVYJFkSPWqHQ3DzPGp960l/sAHqPrI7ufXH0= X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:nebula.arm.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(136003)(346002)(396003)(39850400004)(376002)(36840700001)(46966006)(1076003)(82740400003)(70586007)(83380400001)(36756003)(426003)(81166007)(70206006)(5660300002)(86362001)(8676002)(356005)(2906002)(110136005)(54906003)(8936002)(44832011)(47076005)(4326008)(6666004)(186003)(316002)(2616005)(36860700001)(82310400003)(478600001)(26005)(336012)(7696005)(36900700001);DIR:OUT;SFP:1101; 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X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jul 2021 05:18:39.9705 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 183d19f4-f280-48b6-2cad-08d9475001a7 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d;Ip=[63.35.35.123];Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: AM5EUR03FT026.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR08MB4026 A few functions iterate over the device tree property to get memory info, like "reg" or "xen,static-mem", so this commit creates a new helper device_tree_get_meminfo to extract the common codes. Signed-off-by: Penny Zheng --- xen/arch/arm/bootfdt.c | 104 +++++++++++++++++------------------------ 1 file changed, 42 insertions(+), 62 deletions(-) diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c index d2714446e1..04210684c9 100644 --- a/xen/arch/arm/bootfdt.c +++ b/xen/arch/arm/bootfdt.c @@ -63,6 +63,44 @@ void __init device_tree_get_reg(const __be32 **cell, u32 address_cells, *size = dt_next_cell(size_cells, cell); } +static int __init device_tree_get_meminfo(const void *fdt, int node, + const char *prop_name, + u32 address_cells, u32 size_cells, + void *data) +{ + const struct fdt_property *prop; + unsigned int i, banks; + const __be32 *cell; + u32 reg_cells = address_cells + size_cells; + paddr_t start, size; + struct meminfo *mem = data; + + prop = fdt_get_property(fdt, node, prop_name, NULL); + if ( !prop ) + return -ENOENT; + + cell = (const __be32 *)prop->data; + banks = fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32)); + + for ( i = 0; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ ) + { + device_tree_get_reg(&cell, address_cells, size_cells, &start, &size); + /* Some DT may describe empty bank, ignore them */ + if ( !size ) + continue; + mem->bank[mem->nr_banks].start = start; + mem->bank[mem->nr_banks].size = size; + mem->nr_banks++; + } + + if ( i < banks ) + { + printk("Warning: Max number of supported memory regions reached.\n"); + return -ENOSPC; + } + return 0; +} + u32 __init device_tree_get_u32(const void *fdt, int node, const char *prop_name, u32 dflt) { @@ -139,14 +177,6 @@ static int __init process_memory_node(const void *fdt, int node, u32 address_cells, u32 size_cells, void *data) { - const struct fdt_property *prop; - int i; - int banks; - const __be32 *cell; - paddr_t start, size; - u32 reg_cells = address_cells + size_cells; - struct meminfo *mem = data; - if ( address_cells < 1 || size_cells < 1 ) { printk("fdt: node `%s': invalid #address-cells or #size-cells", @@ -154,27 +184,7 @@ static int __init process_memory_node(const void *fdt, int node, return -EINVAL; } - prop = fdt_get_property(fdt, node, "reg", NULL); - if ( !prop ) - return -ENOENT; - - cell = (const __be32 *)prop->data; - banks = fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32)); - - for ( i = 0; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ ) - { - device_tree_get_reg(&cell, address_cells, size_cells, &start, &size); - /* Some DT may describe empty bank, ignore them */ - if ( !size ) - continue; - mem->bank[mem->nr_banks].start = start; - mem->bank[mem->nr_banks].size = size; - mem->nr_banks++; - } - - if ( i < banks ) - return -ENOSPC; - return 0; + return device_tree_get_meminfo(fdt, node, "reg", address_cells, size_cells, data); } static int __init process_reserved_memory_node(const void *fdt, int node, @@ -195,13 +205,7 @@ static int __init process_reserved_memory_node(const void *fdt, int node, static int __init process_static_memory(const void *fdt, int node, void *data) { - int i = 0, banks; - const __be32 *cell; - paddr_t start, size; - u32 address_cells, size_cells, reg_cells; - struct meminfo *mem = data; - const struct fdt_property *prop; - + u32 address_cells, size_cells; address_cells = device_tree_get_u32(fdt, node, "#xen,static-mem-address-cells", 0); @@ -213,33 +217,9 @@ static int __init process_static_memory(const void *fdt, int node, void *data) "\"#xen,static-mem-address-cell\".\n"); return -EINVAL; } - reg_cells = address_cells + size_cells; - - prop = fdt_get_property(fdt, node, "xen,static-mem", NULL); - /* - * Static memory shall belong to a specific domain, that is, - * its node `domUx` has compatible string "xen,domain". - */ - if ( fdt_node_check_compatible(fdt, node, "xen,domain") != 0 ) - { - printk("xen,static-mem property can only be located under /domUx node.\n"); - return -EINVAL; - } - - cell = (const __be32 *)prop->data; - banks = fdt32_to_cpu(prop->len) / (reg_cells * sizeof (u32)); - - for ( ; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ ) - { - device_tree_get_reg(&cell, address_cells, size_cells, &start, &size); - mem->bank[mem->nr_banks].start = start; - mem->bank[mem->nr_banks].size = size; - mem->nr_banks++; - } - if ( i < banks ) - return -ENOSPC; - return 0; + return device_tree_get_meminfo(fdt, node, "xen,static-mem", address_cells, + size_cells, data); } static int __init process_reserved_memory(const void *fdt, int node,