diff mbox series

[v2,09/11] aspeed: Introduce a spi_boot region under the SoC

Message ID 20230301165619.2171090-10-clg@kaod.org (mailing list archive)
State New, archived
Headers show
Series aspeed queue | expand

Commit Message

Cédric Le Goater March 1, 2023, 4:56 p.m. UTC
The default boot address of the Aspeed SoCs is 0x0. For this reason,
the FMC flash device contents are remapped by HW on the first 256MB of
the address space. In QEMU, this is currently done in the machine init
with the setup of a region alias.

Move this code to the SoC and introduce an extra container to prepare
ground for the boot ROM region which will overlap the FMC flash
remapping.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 include/hw/arm/aspeed_soc.h |  5 +++++
 hw/arm/aspeed.c             | 13 +------------
 hw/arm/aspeed_ast2600.c     | 13 +++++++++++++
 hw/arm/aspeed_soc.c         | 14 ++++++++++++++
 hw/arm/fby35.c              |  8 +-------
 5 files changed, 34 insertions(+), 19 deletions(-)

Comments

Philippe Mathieu-Daudé March 1, 2023, 5:52 p.m. UTC | #1
On 1/3/23 17:56, Cédric Le Goater wrote:
> The default boot address of the Aspeed SoCs is 0x0. For this reason,
> the FMC flash device contents are remapped by HW on the first 256MB of
> the address space. In QEMU, this is currently done in the machine init
> with the setup of a region alias.
> 
> Move this code to the SoC and introduce an extra container to prepare
> ground for the boot ROM region which will overlap the FMC flash
> remapping.
> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
>   include/hw/arm/aspeed_soc.h |  5 +++++
>   hw/arm/aspeed.c             | 13 +------------
>   hw/arm/aspeed_ast2600.c     | 13 +++++++++++++
>   hw/arm/aspeed_soc.c         | 14 ++++++++++++++

Why aspeed2600 duplicates a lot of aspeed_soc_init() /
aspeed_soc_realize() while inheriting from TYPE_ASPEED_SOC?
Is that on purpose or because not using device_class_set_parent_realize?

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>

>   hw/arm/fby35.c              |  8 +-------
>   5 files changed, 34 insertions(+), 19 deletions(-)
Cédric Le Goater March 2, 2023, 9:02 a.m. UTC | #2
On 3/1/23 18:52, Philippe Mathieu-Daudé wrote:
> On 1/3/23 17:56, Cédric Le Goater wrote:
>> The default boot address of the Aspeed SoCs is 0x0. For this reason,
>> the FMC flash device contents are remapped by HW on the first 256MB of
>> the address space. In QEMU, this is currently done in the machine init
>> with the setup of a region alias.
>>
>> Move this code to the SoC and introduce an extra container to prepare
>> ground for the boot ROM region which will overlap the FMC flash
>> remapping.
>>
>> Signed-off-by: Cédric Le Goater <clg@kaod.org>
>> ---
>>   include/hw/arm/aspeed_soc.h |  5 +++++
>>   hw/arm/aspeed.c             | 13 +------------
>>   hw/arm/aspeed_ast2600.c     | 13 +++++++++++++
>>   hw/arm/aspeed_soc.c         | 14 ++++++++++++++
> 
> Why aspeed2600 duplicates a lot of aspeed_soc_init() /
> aspeed_soc_realize() while inheriting from TYPE_ASPEED_SOC?

We thought, back in 2019 or so, that duplicating the models was a better
approach to keep a clear understanding of the SoCs and their differences.
I agree they are very similar and maybe that was not the best solution.
OTOH, AST2600 has being receiving the most attention since it is the
latest.

The common TYPE_ASPEED_SOC is required to share a few properties at the
board level if I remember well.

Thanks,

C.

> Is that on purpose or because not using device_class_set_parent_realize?
> 
> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> 
>>   hw/arm/fby35.c              |  8 +-------
>>   5 files changed, 34 insertions(+), 19 deletions(-)
>
diff mbox series

Patch

diff --git a/include/hw/arm/aspeed_soc.h b/include/hw/arm/aspeed_soc.h
index bd1e03e78a..8adff70072 100644
--- a/include/hw/arm/aspeed_soc.h
+++ b/include/hw/arm/aspeed_soc.h
@@ -58,6 +58,8 @@  struct AspeedSoCState {
     MemoryRegion *dram_mr;
     MemoryRegion dram_container;
     MemoryRegion sram;
+    MemoryRegion spi_boot_container;
+    MemoryRegion spi_boot;
     AspeedVICState vic;
     AspeedRtcState rtc;
     AspeedTimerCtrlState timerctrl;
@@ -120,6 +122,7 @@  struct AspeedSoCClass {
 
 
 enum {
+    ASPEED_DEV_SPI_BOOT,
     ASPEED_DEV_IOMEM,
     ASPEED_DEV_UART1,
     ASPEED_DEV_UART2,
@@ -190,6 +193,8 @@  enum {
     ASPEED_DEV_JTAG1,
 };
 
+#define ASPEED_SOC_SPI_BOOT_ADDR 0x0
+
 qemu_irq aspeed_soc_get_irq(AspeedSoCState *s, int dev);
 bool aspeed_soc_uart_realize(AspeedSoCState *s, Error **errp);
 void aspeed_soc_uart_set_chr(AspeedSoCState *s, int dev, Chardev *chr);
diff --git a/hw/arm/aspeed.c b/hw/arm/aspeed.c
index cb59a37b07..4a2814b7ea 100644
--- a/hw/arm/aspeed.c
+++ b/hw/arm/aspeed.c
@@ -388,18 +388,7 @@  static void aspeed_machine_init(MachineState *machine)
         MemoryRegion *boot_rom = g_new(MemoryRegion, 1);
         uint64_t size = memory_region_size(&fl->mmio);
 
-        /*
-         * create a ROM region using the default mapping window size of
-         * the flash module. The window size is 64MB for the AST2400
-         * SoC and 128MB for the AST2500 SoC, which is twice as big as
-         * needed by the flash modules of the Aspeed machines.
-         */
-        if (ASPEED_MACHINE(machine)->mmio_exec) {
-            memory_region_init_alias(boot_rom, NULL, "aspeed.boot_rom",
-                                     &fl->mmio, 0, size);
-            memory_region_add_subregion(get_system_memory(), FIRMWARE_ADDR,
-                                        boot_rom);
-        } else {
+        if (!ASPEED_MACHINE(machine)->mmio_exec) {
             memory_region_init_rom(boot_rom, NULL, "aspeed.boot_rom",
                                    size, &error_abort);
             memory_region_add_subregion(get_system_memory(), FIRMWARE_ADDR,
diff --git a/hw/arm/aspeed_ast2600.c b/hw/arm/aspeed_ast2600.c
index bb2769df04..1bf1246148 100644
--- a/hw/arm/aspeed_ast2600.c
+++ b/hw/arm/aspeed_ast2600.c
@@ -21,6 +21,7 @@ 
 #define ASPEED_SOC_DPMCU_SIZE       0x00040000
 
 static const hwaddr aspeed_soc_ast2600_memmap[] = {
+    [ASPEED_DEV_SPI_BOOT]  = ASPEED_SOC_SPI_BOOT_ADDR,
     [ASPEED_DEV_SRAM]      = 0x10000000,
     [ASPEED_DEV_DPMCU]     = 0x18000000,
     /* 0x16000000     0x17FFFFFF : AHB BUS do LPC Bus bridge */
@@ -282,6 +283,12 @@  static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     qemu_irq irq;
     g_autofree char *sram_name = NULL;
 
+    /* Default boot region (SPI memory or ROMs) */
+    memory_region_init(&s->spi_boot_container, OBJECT(s),
+                       "aspeed.spi_boot_container", 0x10000000);
+    memory_region_add_subregion(s->memory, sc->memmap[ASPEED_DEV_SPI_BOOT],
+                                &s->spi_boot_container);
+
     /* IO space */
     aspeed_mmio_map_unimplemented(s, SYS_BUS_DEVICE(&s->iomem), "aspeed.io",
                                   sc->memmap[ASPEED_DEV_IOMEM],
@@ -431,6 +438,12 @@  static void aspeed_soc_ast2600_realize(DeviceState *dev, Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fmc), 0,
                        aspeed_soc_get_irq(s, ASPEED_DEV_FMC));
 
+    /* Set up an alias on the FMC CE0 region (boot default) */
+    MemoryRegion *fmc0_mmio = &s->fmc.flashes[0].mmio;
+    memory_region_init_alias(&s->spi_boot, OBJECT(s), "aspeed.spi_boot",
+                             fmc0_mmio, 0, memory_region_size(fmc0_mmio));
+    memory_region_add_subregion(&s->spi_boot_container, 0x0, &s->spi_boot);
+
     /* SPI */
     for (i = 0; i < sc->spis_num; i++) {
         object_property_set_link(OBJECT(&s->spi[i]), "dram",
diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
index e884d6badc..bf22258de9 100644
--- a/hw/arm/aspeed_soc.c
+++ b/hw/arm/aspeed_soc.c
@@ -25,6 +25,7 @@ 
 #define ASPEED_SOC_IOMEM_SIZE       0x00200000
 
 static const hwaddr aspeed_soc_ast2400_memmap[] = {
+    [ASPEED_DEV_SPI_BOOT]  =  ASPEED_SOC_SPI_BOOT_ADDR,
     [ASPEED_DEV_IOMEM]  = 0x1E600000,
     [ASPEED_DEV_FMC]    = 0x1E620000,
     [ASPEED_DEV_SPI1]   = 0x1E630000,
@@ -59,6 +60,7 @@  static const hwaddr aspeed_soc_ast2400_memmap[] = {
 };
 
 static const hwaddr aspeed_soc_ast2500_memmap[] = {
+    [ASPEED_DEV_SPI_BOOT]  = ASPEED_SOC_SPI_BOOT_ADDR,
     [ASPEED_DEV_IOMEM]  = 0x1E600000,
     [ASPEED_DEV_FMC]    = 0x1E620000,
     [ASPEED_DEV_SPI1]   = 0x1E630000,
@@ -245,6 +247,12 @@  static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     Error *err = NULL;
     g_autofree char *sram_name = NULL;
 
+    /* Default boot region (SPI memory or ROMs) */
+    memory_region_init(&s->spi_boot_container, OBJECT(s),
+                       "aspeed.spi_boot_container", 0x10000000);
+    memory_region_add_subregion(s->memory, sc->memmap[ASPEED_DEV_SPI_BOOT],
+                                &s->spi_boot_container);
+
     /* IO space */
     aspeed_mmio_map_unimplemented(s, SYS_BUS_DEVICE(&s->iomem), "aspeed.io",
                                   sc->memmap[ASPEED_DEV_IOMEM],
@@ -354,6 +362,12 @@  static void aspeed_soc_realize(DeviceState *dev, Error **errp)
     sysbus_connect_irq(SYS_BUS_DEVICE(&s->fmc), 0,
                        aspeed_soc_get_irq(s, ASPEED_DEV_FMC));
 
+    /* Set up an alias on the FMC CE0 region (boot default) */
+    MemoryRegion *fmc0_mmio = &s->fmc.flashes[0].mmio;
+    memory_region_init_alias(&s->spi_boot, OBJECT(s), "aspeed.spi_boot",
+                             fmc0_mmio, 0, memory_region_size(fmc0_mmio));
+    memory_region_add_subregion(&s->spi_boot_container, 0x0, &s->spi_boot);
+
     /* SPI */
     for (i = 0; i < sc->spis_num; i++) {
         if (!sysbus_realize(SYS_BUS_DEVICE(&s->spi[i]), errp)) {
diff --git a/hw/arm/fby35.c b/hw/arm/fby35.c
index 90c04bbc33..f4600c290b 100644
--- a/hw/arm/fby35.c
+++ b/hw/arm/fby35.c
@@ -100,13 +100,7 @@  static void fby35_bmc_init(Fby35State *s)
         MemoryRegion *boot_rom = g_new(MemoryRegion, 1);
         uint64_t size = memory_region_size(&fl->mmio);
 
-        if (s->mmio_exec) {
-            memory_region_init_alias(boot_rom, NULL, "aspeed.boot_rom",
-                                     &fl->mmio, 0, size);
-            memory_region_add_subregion(&s->bmc_memory, FBY35_BMC_FIRMWARE_ADDR,
-                                        boot_rom);
-        } else {
-
+        if (!s->mmio_exec) {
             memory_region_init_rom(boot_rom, NULL, "aspeed.boot_rom",
                                    size, &error_abort);
             memory_region_add_subregion(&s->bmc_memory, FBY35_BMC_FIRMWARE_ADDR,