ppc4xx_sdram: Convert DDR SDRAM controller to new bank handling

Use the generic bank handling introduced in previous patch in the DDR
SDRAM controller too. This also fixes previously broken region unmap
due to sdram_ddr_unmap_bcr() ignoring container region so it crashed
with an assert when the guest tried to disable the controller.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: <fc7c50e365d0027a659111e9cd67f9b93113a163.1666194485.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

1 files changed, 37 insertions, 61 deletions

diff --git a/hw/ppc/ppc4xx_sdram.c b/hw/ppc/ppc4xx_sdram.c
index 63a33b8fd4..7c097efe20 100644
--- a/hw/ppc/ppc4xx_sdram.c
+++ b/hw/ppc/ppc4xx_sdram.c
@@ -141,6 +141,8 @@ enum {
 
 /*****************************************************************************/
 /* DDR SDRAM controller */
+#define SDRAM_DDR_BCR_MASK 0xFFDEE001
+
 static uint32_t sdram_ddr_bcr(hwaddr ram_base, hwaddr ram_size)
 {
     uint32_t bcr;
@@ -199,58 +201,6 @@ static hwaddr sdram_ddr_size(uint32_t bcr)
     return size;
 }
 
-static void sdram_ddr_set_bcr(Ppc4xxSdramDdrState *sdram, int i,
-                              uint32_t bcr, int enabled)
-{
-    if (sdram->bank[i].bcr & 1) {
-        /* Unmap RAM */
-        trace_ppc4xx_sdram_unmap(sdram_ddr_base(sdram->bank[i].bcr),
-                                 sdram_ddr_size(sdram->bank[i].bcr));
-        memory_region_del_subregion(get_system_memory(),
-                                    &sdram->bank[i].container);
-        memory_region_del_subregion(&sdram->bank[i].container,
-                                    &sdram->bank[i].ram);
-        object_unparent(OBJECT(&sdram->bank[i].container));
-    }
-    sdram->bank[i].bcr = bcr & 0xFFDEE001;
-    if (enabled && (bcr & 1)) {
-        trace_ppc4xx_sdram_map(sdram_ddr_base(bcr), sdram_ddr_size(bcr));
-        memory_region_init(&sdram->bank[i].container, NULL, "sdram-container",
-                           sdram_ddr_size(bcr));
-        memory_region_add_subregion(&sdram->bank[i].container, 0,
-                                    &sdram->bank[i].ram);
-        memory_region_add_subregion(get_system_memory(),
-                                    sdram_ddr_base(bcr),
-                                    &sdram->bank[i].container);
-    }
-}
-
-static void sdram_ddr_map_bcr(Ppc4xxSdramDdrState *sdram)
-{
-    int i;
-
-    for (i = 0; i < sdram->nbanks; i++) {
-        if (sdram->bank[i].size != 0) {
-            sdram_ddr_set_bcr(sdram, i, sdram_ddr_bcr(sdram->bank[i].base,
-                                                      sdram->bank[i].size), 1);
-        } else {
-            sdram_ddr_set_bcr(sdram, i, 0, 0);
-        }
-    }
-}
-
-static void sdram_ddr_unmap_bcr(Ppc4xxSdramDdrState *sdram)
-{
-    int i;
-
-    for (i = 0; i < sdram->nbanks; i++) {
-        trace_ppc4xx_sdram_unmap(sdram_ddr_base(sdram->bank[i].bcr),
-                                 sdram_ddr_size(sdram->bank[i].bcr));
-        memory_region_del_subregion(get_system_memory(),
-                                    &sdram->bank[i].ram);
-    }
-}
-
 static uint32_t sdram_ddr_dcr_read(void *opaque, int dcrn)
 {
     Ppc4xxSdramDdrState *s = opaque;
@@ -321,6 +271,7 @@ static uint32_t sdram_ddr_dcr_read(void *opaque, int dcrn)
 static void sdram_ddr_dcr_write(void *opaque, int dcrn, uint32_t val)
 {
     Ppc4xxSdramDdrState *s = opaque;
+    int i;
 
     switch (dcrn) {
     case SDRAM0_CFGADDR:
@@ -342,12 +293,24 @@ static void sdram_ddr_dcr_write(void *opaque, int dcrn, uint32_t val)
             if (!(s->cfg & 0x80000000) && (val & 0x80000000)) {
                 trace_ppc4xx_sdram_enable("enable");
                 /* validate all RAM mappings */
-                sdram_ddr_map_bcr(s);
+                for (i = 0; i < s->nbanks; i++) {
+                    if (s->bank[i].size) {
+                        sdram_bank_set_bcr(&s->bank[i], s->bank[i].bcr,
+                                           s->bank[i].base, s->bank[i].size,
+                                           1);
+                    }
+                }
                 s->status &= ~0x80000000;
             } else if ((s->cfg & 0x80000000) && !(val & 0x80000000)) {
                 trace_ppc4xx_sdram_enable("disable");
                 /* invalidate all RAM mappings */
-                sdram_ddr_unmap_bcr(s);
+                for (i = 0; i < s->nbanks; i++) {
+                    if (s->bank[i].size) {
+                        sdram_bank_set_bcr(&s->bank[i], s->bank[i].bcr,
+                                           s->bank[i].base, s->bank[i].size,
+                                           0);
+                    }
+                }
                 s->status |= 0x80000000;
             }
             if (!(s->cfg & 0x40000000) && (val & 0x40000000)) {
@@ -367,16 +330,16 @@ static void sdram_ddr_dcr_write(void *opaque, int dcrn, uint32_t val)
             s->pmit = (val & 0xF8000000) | 0x07C00000;
             break;
         case 0x40: /* SDRAM_B0CR */
-            sdram_ddr_set_bcr(s, 0, val, s->cfg & 0x80000000);
-            break;
         case 0x44: /* SDRAM_B1CR */
-            sdram_ddr_set_bcr(s, 1, val, s->cfg & 0x80000000);
-            break;
         case 0x48: /* SDRAM_B2CR */
-            sdram_ddr_set_bcr(s, 2, val, s->cfg & 0x80000000);
-            break;
         case 0x4C: /* SDRAM_B3CR */
-            sdram_ddr_set_bcr(s, 3, val, s->cfg & 0x80000000);
+            i = (s->addr - 0x40) / 4;
+            val &= SDRAM_DDR_BCR_MASK;
+            if (s->bank[i].size) {
+                sdram_bank_set_bcr(&s->bank[i], val,
+                                   sdram_ddr_base(val), sdram_ddr_size(val),
+                                   s->cfg & 0x80000000);
+            }
             break;
         case 0x80: /* SDRAM_TR */
             s->tr = val & 0x018FC01F;
@@ -426,6 +389,7 @@ static void ppc4xx_sdram_ddr_realize(DeviceState *dev, Error **errp)
     const ram_addr_t valid_bank_sizes[] = {
         256 * MiB, 128 * MiB, 64 * MiB, 32 * MiB, 16 * MiB, 8 * MiB, 4 * MiB, 0
     };
+    int i;
 
     if (s->nbanks < 1 || s->nbanks > 4) {
         error_setg(errp, "Invalid number of RAM banks");
@@ -436,6 +400,18 @@ static void ppc4xx_sdram_ddr_realize(DeviceState *dev, Error **errp)
         return;
     }
     ppc4xx_sdram_banks(s->dram_mr, s->nbanks, s->bank, valid_bank_sizes);
+    for (i = 0; i < s->nbanks; i++) {
+        if (s->bank[i].size) {
+            s->bank[i].bcr = sdram_ddr_bcr(s->bank[i].base, s->bank[i].size);
+            sdram_bank_set_bcr(&s->bank[i], s->bank[i].bcr,
+                               s->bank[i].base, s->bank[i].size, 0);
+        } else {
+            sdram_bank_set_bcr(&s->bank[i], 0, 0, 0, 0);
+        }
+        trace_ppc4xx_sdram_init(sdram_ddr_base(s->bank[i].bcr),
+                                sdram_ddr_size(s->bank[i].bcr),
+                                s->bank[i].bcr);
+    }
 
     sysbus_init_irq(SYS_BUS_DEVICE(dev), &s->irq);