[PULL 53/62] ppc4xx_sdram: Generalise bank setup

[Daniel Henrique Barboza]

From: BALATON Zoltan <balaton@eik.bme.hu>

Currently only base and size are set on initial bank creation and bcr
value is computed on mapping the region. Set bcr at init so the bcr
encoding method becomes local to the controller model and mapping and
unmapping can operate on the bank so it can be shared between
different controller models. This patch converts the DDR2 controller.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Message-Id: 
<51b957b4b2d714a1072aa2589b979e08411640df.1666194485.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
 hw/ppc/ppc4xx_sdram.c | 91 ++++++++++++++++++++++---------------------
 hw/ppc/trace-events   |  1 +
 2 files changed, 48 insertions(+), 44 deletions(-)

diff --git a/hw/ppc/ppc4xx_sdram.c b/hw/ppc/ppc4xx_sdram.c
index 4bc53c8f01..63a33b8fd4 100644
--- a/hw/ppc/ppc4xx_sdram.c
+++ b/hw/ppc/ppc4xx_sdram.c
@@ -105,6 +105,7 @@ static void ppc4xx_sdram_banks(MemoryRegion *ram, int 
nr_banks,
 
 static void sdram_bank_map(Ppc4xxSdramBank *bank)
 {
+    trace_ppc4xx_sdram_map(bank->base, bank->size);
     memory_region_init(&bank->container, NULL, "sdram-container", bank->size);
     memory_region_add_subregion(&bank->container, 0, &bank->ram);
     memory_region_add_subregion(get_system_memory(), bank->base,
@@ -113,11 +114,26 @@ static void sdram_bank_map(Ppc4xxSdramBank *bank)
 
 static void sdram_bank_unmap(Ppc4xxSdramBank *bank)
 {
+    trace_ppc4xx_sdram_unmap(bank->base, bank->size);
     memory_region_del_subregion(get_system_memory(), &bank->container);
     memory_region_del_subregion(&bank->container, &bank->ram);
     object_unparent(OBJECT(&bank->container));
 }
 
+static void sdram_bank_set_bcr(Ppc4xxSdramBank *bank, uint32_t bcr,
+                               hwaddr base, hwaddr size, int enabled)
+{
+    if (memory_region_is_mapped(&bank->container)) {
+        sdram_bank_unmap(bank);
+    }
+    bank->bcr = bcr;
+    bank->base = base;
+    bank->size = size;
+    if (enabled && (bcr & 1)) {
+        sdram_bank_map(bank);
+    }
+}
+
 enum {
     SDRAM0_CFGADDR = 0x010,
     SDRAM0_CFGDATA = 0x011,
@@ -455,6 +471,8 @@ void ppc4xx_sdram_ddr_enable(Ppc4xxSdramDdrState *s)
 
 /*****************************************************************************/
 /* DDR2 SDRAM controller */
+#define SDRAM_DDR2_BCR_MASK 0xffe0ffc1
+
 enum {
     SDRAM_R0BAS = 0x40,
     SDRAM_R1BAS,
@@ -528,48 +546,6 @@ static hwaddr sdram_ddr2_size(uint32_t bcr)
     return size;
 }
 
-static void sdram_ddr2_set_bcr(Ppc4xxSdramDdr2State *sdram, int i,
-                               uint32_t bcr, int enabled)
-{
-    if (sdram->bank[i].bcr & 1) {
-        /* First unmap RAM if enabled */
-        trace_ppc4xx_sdram_unmap(sdram_ddr2_base(sdram->bank[i].bcr),
-                                 sdram_ddr2_size(sdram->bank[i].bcr));
-        sdram_bank_unmap(&sdram->bank[i]);
-    }
-    sdram->bank[i].bcr = bcr & 0xffe0ffc1;
-    if (enabled && (bcr & 1)) {
-        trace_ppc4xx_sdram_map(sdram_ddr2_base(bcr), sdram_ddr2_size(bcr));
-        sdram_bank_map(&sdram->bank[i]);
-    }
-}
-
-static void sdram_ddr2_map_bcr(Ppc4xxSdramDdr2State *sdram)
-{
-    int i;
-
-    for (i = 0; i < sdram->nbanks; i++) {
-        if (sdram->bank[i].size) {
-            sdram_ddr2_set_bcr(sdram, i,
-                               sdram_ddr2_bcr(sdram->bank[i].base,
-                                              sdram->bank[i].size), 1);
-        } else {
-            sdram_ddr2_set_bcr(sdram, i, 0, 0);
-        }
-    }
-}
-
-static void sdram_ddr2_unmap_bcr(Ppc4xxSdramDdr2State *sdram)
-{
-    int i;
-
-    for (i = 0; i < sdram->nbanks; i++) {
-        if (sdram->bank[i].size) {
-            sdram_ddr2_set_bcr(sdram, i, sdram->bank[i].bcr & ~1, 0);
-        }
-    }
-}
-
 static uint32_t sdram_ddr2_dcr_read(void *opaque, int dcrn)
 {
     Ppc4xxSdramDdr2State *s = opaque;
@@ -628,6 +604,7 @@ static uint32_t sdram_ddr2_dcr_read(void *opaque, int dcrn)
 static void sdram_ddr2_dcr_write(void *opaque, int dcrn, uint32_t val)
 {
     Ppc4xxSdramDdr2State *s = opaque;
+    int i;
 
     switch (dcrn) {
     case SDRAM_R0BAS:
@@ -652,13 +629,25 @@ static void sdram_ddr2_dcr_write(void *opaque, int dcrn, 
uint32_t val)
                 (val & SDRAM_DDR2_MCOPT2_DCEN)) {
                 trace_ppc4xx_sdram_enable("enable");
                 /* validate all RAM mappings */
-                sdram_ddr2_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->mcopt2 |= SDRAM_DDR2_MCOPT2_DCEN;
             } else if ((s->mcopt2 & SDRAM_DDR2_MCOPT2_DCEN) &&
                        !(val & SDRAM_DDR2_MCOPT2_DCEN)) {
                 trace_ppc4xx_sdram_enable("disable");
                 /* invalidate all RAM mappings */
-                sdram_ddr2_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->mcopt2 &= ~SDRAM_DDR2_MCOPT2_DCEN;
             }
             break;
@@ -691,6 +680,7 @@ static void ppc4xx_sdram_ddr2_realize(DeviceState *dev, 
Error **errp)
         2 * GiB, 1 * GiB, 512 * MiB, 256 * MiB, 128 * MiB,
         64 * MiB, 32 * MiB, 16 * MiB, 8 * MiB, 0
     };
+    int i;
 
     if (s->nbanks < 1 || s->nbanks > 4) {
         error_setg(errp, "Invalid number of RAM banks");
@@ -701,6 +691,19 @@ static void ppc4xx_sdram_ddr2_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_ddr2_bcr(s->bank[i].base, s->bank[i].size);
+            s->bank[i].bcr &= SDRAM_DDR2_BCR_MASK;
+            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_ddr2_base(s->bank[i].bcr),
+                                sdram_ddr2_size(s->bank[i].bcr),
+                                s->bank[i].bcr);
+    }
 
     ppc4xx_dcr_register(dcr, SDRAM0_CFGADDR,
                         s, &sdram_ddr2_dcr_read, &sdram_ddr2_dcr_write);
diff --git a/hw/ppc/trace-events b/hw/ppc/trace-events
index 956938ebcd..f670e8906c 100644
--- a/hw/ppc/trace-events
+++ b/hw/ppc/trace-events
@@ -179,3 +179,4 @@ ppc405ep_clocks_setup(const char *trace) "%s"
 ppc4xx_sdram_enable(const char *trace) "%s SDRAM controller"
 ppc4xx_sdram_unmap(uint64_t addr, uint64_t size) "Unmap RAM area 0x%" PRIx64 " 
size 0x%" PRIx64
 ppc4xx_sdram_map(uint64_t addr, uint64_t size) "Map RAM area 0x%" PRIx64 " 
size 0x%" PRIx64
+ppc4xx_sdram_init(uint64_t base, uint64_t size, uint32_t bcr) "Init RAM area 
0x%" PRIx64 " size 0x%" PRIx64 " bcr 0x%x"
-- 
2.37.3