hw/arm/xlnx-versal: bbram: refactor creation

Refactor the BBRAM device creation using the VersalMap structure.

Note that the corresponding FDT node is removed. It does not correspond
to any real node in standard Versal DTBs. No matching drivers exist for
it.

Signed-off-by: Luc Michel <luc.michel@amd.com>
Reviewed-by: Francisco Iglesias <francisco.iglesias@amd.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@amd.com>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20250926070806.292065-15-luc.michel@amd.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

3 files changed, 33 insertions, 38 deletions

diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c
index a948e24aea..f766a3e102 100644
--- a/hw/arm/xlnx-versal-virt.c
+++ b/hw/arm/xlnx-versal-virt.c
@@ -172,26 +172,6 @@ static void fdt_add_rtc_node(VersalVirt *s)
     g_free(name);
 }
 
-static void fdt_add_bbram_node(VersalVirt *s)
-{
-    const char compat[] = TYPE_XLNX_BBRAM;
-    const char interrupt_names[] = "bbram-error";
-    char *name = g_strdup_printf("/bbram@%x", MM_PMC_BBRAM_CTRL);
-
-    qemu_fdt_add_subnode(s->fdt, name);
-
-    qemu_fdt_setprop_cells(s->fdt, name, "interrupts",
-                           GIC_FDT_IRQ_TYPE_SPI, VERSAL_PMC_APB_IRQ,
-                           GIC_FDT_IRQ_FLAGS_LEVEL_HI);
-    qemu_fdt_setprop(s->fdt, name, "interrupt-names",
-                     interrupt_names, sizeof(interrupt_names));
-    qemu_fdt_setprop_sized_cells(s->fdt, name, "reg",
-                                 2, MM_PMC_BBRAM_CTRL,
-                                 2, MM_PMC_BBRAM_CTRL_SIZE);
-    qemu_fdt_setprop(s->fdt, name, "compatible", compat, sizeof(compat));
-    g_free(name);
-}
-
 static void fdt_nop_memory_nodes(void *fdt, Error **errp)
 {
     Error *err = NULL;
@@ -346,7 +326,7 @@ static void create_virtio_regions(VersalVirt *s)
     }
 }
 
-static void bbram_attach_drive(XlnxBBRam *dev)
+static void bbram_attach_drive(VersalVirt *s)
 {
     DriveInfo *dinfo;
     BlockBackend *blk;
@@ -354,7 +334,7 @@ static void bbram_attach_drive(XlnxBBRam *dev)
     dinfo = drive_get_by_index(IF_PFLASH, 0);
     blk = dinfo ? blk_by_legacy_dinfo(dinfo) : NULL;
     if (blk) {
-        qdev_prop_set_drive(DEVICE(dev), "drive", blk);
+        versal_bbram_attach_drive(&s->soc, blk);
     }
 }
 
@@ -447,7 +427,6 @@ static void versal_virt_init(MachineState *machine)
     fdt_add_gic_nodes(s);
     fdt_add_timer_nodes(s);
     fdt_add_rtc_node(s);
-    fdt_add_bbram_node(s);
     fdt_add_cpu_nodes(s, psci_conduit);
     fdt_add_clk_node(s, "/old-clk125", 125000000, s->phandle.clk_125Mhz);
     fdt_add_clk_node(s, "/old-clk25", 25000000, s->phandle.clk_25Mhz);
@@ -458,7 +437,7 @@ static void versal_virt_init(MachineState *machine)
                                         0, &s->soc.fpd.apu.mr, 0);
 
     /* Attach bbram backend, if given */
-    bbram_attach_drive(&s->soc.pmc.bbram);
+    bbram_attach_drive(s);
 
     /* Attach efuse backend, if given */
     efuse_attach_drive(s);
diff --git a/hw/arm/xlnx-versal.c b/hw/arm/xlnx-versal.c
index e71c774e72..31ceaf61be 100644
--- a/hw/arm/xlnx-versal.c
+++ b/hw/arm/xlnx-versal.c
@@ -36,6 +36,7 @@
 #include "hw/nvram/xlnx-versal-efuse.h"
 #include "hw/ssi/xlnx-versal-ospi.h"
 #include "hw/misc/xlnx-versal-pmc-iou-slcr.h"
+#include "hw/nvram/xlnx-bbram.h"
 
 #define XLNX_VERSAL_ACPU_TYPE ARM_CPU_TYPE_NAME("cortex-a72")
 #define XLNX_VERSAL_RCPU_TYPE ARM_CPU_TYPE_NAME("cortex-r5f")
@@ -119,6 +120,7 @@ typedef struct VersalMap {
     } ospi;
 
     VersalSimplePeriphMap pmc_iou_slcr;
+    VersalSimplePeriphMap bbram;
 } VersalMap;
 
 static const VersalMap VERSAL_MAP = {
@@ -161,6 +163,7 @@ static const VersalMap VERSAL_MAP = {
     },
 
     .pmc_iou_slcr = { 0xf1060000, OR_IRQ(121, 0) },
+    .bbram = { 0xf11f0000, OR_IRQ(121, 1) },
 };
 
 static const VersalMap *VERSION_TO_MAP[] = {
@@ -820,22 +823,21 @@ static void versal_create_xrams(Versal *s, const struct VersalXramMap *map)
     }
 }
 
-static void versal_create_bbram(Versal *s, qemu_irq *pic)
+static void versal_create_bbram(Versal *s,
+                                const VersalSimplePeriphMap *map)
 {
+    DeviceState *dev;
     SysBusDevice *sbd;
 
-    object_initialize_child_with_props(OBJECT(s), "bbram", &s->pmc.bbram,
-                                       sizeof(s->pmc.bbram), TYPE_XLNX_BBRAM,
-                                       &error_fatal,
-                                       "crc-zpads", "0",
-                                       NULL);
-    sbd = SYS_BUS_DEVICE(&s->pmc.bbram);
+    dev = qdev_new(TYPE_XLNX_BBRAM);
+    sbd = SYS_BUS_DEVICE(dev);
 
-    sysbus_realize(sbd, &error_fatal);
-    memory_region_add_subregion(&s->mr_ps, MM_PMC_BBRAM_CTRL,
+    object_property_add_child(OBJECT(s), "bbram", OBJECT(dev));
+    qdev_prop_set_uint32(dev, "crc-zpads", 0);
+    sysbus_realize_and_unref(sbd, &error_abort);
+    memory_region_add_subregion(&s->mr_ps, map->addr,
                                 sysbus_mmio_get_region(sbd, 0));
-    sysbus_connect_irq(sbd, 0,
-                       qdev_get_gpio_in(DEVICE(&s->pmc.apb_irq_orgate), 1));
+    versal_sysbus_connect_irq(s, sbd, 0, map->irq);
 }
 
 static void versal_create_efuse(Versal *s,
@@ -1334,10 +1336,12 @@ static void versal_realize(DeviceState *dev, Error **errp)
     qdev_connect_gpio_out_named(slcr, "ospi-mux-sel", 0,
                                 qdev_get_gpio_in_named(ospi,
                                                        "ospi-mux-sel", 0));
+
+    versal_create_bbram(s, &map->bbram);
+
     versal_create_pmc_apb_irq_orgate(s, pic);
     versal_create_rtc(s, pic);
     versal_create_trng(s, pic);
-    versal_create_bbram(s, pic);
     versal_create_crl(s, pic);
     versal_create_cfu(s, pic);
     versal_map_ddr(s);
@@ -1383,6 +1387,19 @@ void versal_efuse_attach_drive(Versal *s, BlockBackend *blk)
     qdev_prop_set_drive(efuse, "drive", blk);
 }
 
+void versal_bbram_attach_drive(Versal *s, BlockBackend *blk)
+{
+    DeviceState *bbram;
+
+    bbram = DEVICE(versal_get_child(s, "bbram"));
+
+    if (bbram == NULL) {
+        return;
+    }
+
+    qdev_prop_set_drive(bbram, "drive", blk);
+}
+
 void versal_ospi_create_flash(Versal *s, int flash_idx, const char *flash_mdl,
                               BlockBackend *blk)
 {
diff --git a/include/hw/arm/xlnx-versal.h b/include/hw/arm/xlnx-versal.h
index 78442e6c2c..9adce02f8a 100644
--- a/include/hw/arm/xlnx-versal.h
+++ b/include/hw/arm/xlnx-versal.h
@@ -19,7 +19,6 @@
 #include "hw/intc/arm_gicv3.h"
 #include "hw/rtc/xlnx-zynqmp-rtc.h"
 #include "qom/object.h"
-#include "hw/nvram/xlnx-bbram.h"
 #include "hw/misc/xlnx-versal-crl.h"
 #include "hw/misc/xlnx-versal-trng.h"
 #include "net/can_emu.h"
@@ -85,7 +84,6 @@ struct Versal {
     struct {
         XlnxZynqMPRTC rtc;
         XlnxVersalTRng trng;
-        XlnxBBRam bbram;
         XlnxVersalCFUAPB cfu_apb;
         XlnxVersalCFUFDRO cfu_fdro;
         XlnxVersalCFUSFR cfu_sfr;
@@ -121,6 +119,7 @@ static inline void versal_set_fdt(Versal *s, void *fdt)
 
 void versal_sdhci_plug_card(Versal *s, int sd_idx, BlockBackend *blk);
 void versal_efuse_attach_drive(Versal *s, BlockBackend *blk);
+void versal_bbram_attach_drive(Versal *s, BlockBackend *blk);
 void versal_ospi_create_flash(Versal *s, int flash_idx, const char *flash_mdl,
                               BlockBackend *blk);