[Qemu-devel] [PATCH v2 3/3] mips_fulong2e: Dynamically generate SPD EEPROM data

[BALATON Zoltan]

The machine comes with 256M memory module by default but it's
upgradable so it could have different memory size. There was a TODO
comment to replace static SPD EEPROM data with dynamically generated
one to support this. Now that we have a function for that, it's easy
to do. Although this would allow larger RAM sizes, the peculiar memory
map of the machine may need some special handling to map it as low and
high memory. Because I don't know what the correct place would be for
highmem, I've left memory size fixed at 256M for now and TODO is moved
there instead.

Signed-off-by: BALATON Zoltan <address@hidden>
Reviewed-by: Philippe Mathieu-Daudé <address@hidden>
Tested-by: Philippe Mathieu-Daudé <address@hidden>
---
 hw/mips/mips_fulong2e.c | 31 +++++++++++++------------------
 1 file changed, 13 insertions(+), 18 deletions(-)

diff --git a/hw/mips/mips_fulong2e.c b/hw/mips/mips_fulong2e.c
index 10e6ed585a..eec6fd02c8 100644
--- a/hw/mips/mips_fulong2e.c
+++ b/hw/mips/mips_fulong2e.c
@@ -214,20 +214,6 @@ static void main_cpu_reset(void *opaque)
     }
 }
 
-static const uint8_t eeprom_spd[0x80] = {
-    0x80,0x08,0x07,0x0d,0x09,0x02,0x40,0x00,0x04,0x70,
-    0x70,0x00,0x82,0x10,0x00,0x01,0x0e,0x04,0x0c,0x01,
-    0x02,0x20,0x80,0x75,0x70,0x00,0x00,0x50,0x3c,0x50,
-    0x2d,0x20,0xb0,0xb0,0x50,0x50,0x00,0x00,0x00,0x00,
-    0x00,0x41,0x48,0x3c,0x32,0x75,0x00,0x00,0x00,0x00,
-    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-    0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
-    0x00,0x00,0x00,0x9c,0x7b,0x07,0x00,0x00,0x00,0x00,
-    0x00,0x00,0x00,0x00,0x48,0x42,0x35,0x34,0x41,0x32,
-    0x35,0x36,0x38,0x4b,0x4e,0x2d,0x41,0x37,0x35,0x42,
-    0x20,0x30,0x20
-};
-
 static void vt82c686b_southbridge_init(PCIBus *pci_bus, int slot, qemu_irq 
intc,
                                        I2CBus **i2c_bus, ISABus **p_isa_bus)
 {
@@ -284,7 +270,6 @@ static void network_init (PCIBus *pci_bus)
 
 static void mips_fulong2e_init(MachineState *machine)
 {
-    ram_addr_t ram_size = machine->ram_size;
     const char *kernel_filename = machine->kernel_filename;
     const char *kernel_cmdline = machine->kernel_cmdline;
     const char *initrd_filename = machine->initrd_filename;
@@ -292,7 +277,10 @@ static void mips_fulong2e_init(MachineState *machine)
     MemoryRegion *address_space_mem = get_system_memory();
     MemoryRegion *ram = g_new(MemoryRegion, 1);
     MemoryRegion *bios = g_new(MemoryRegion, 1);
+    ram_addr_t ram_size = machine->ram_size;
     long bios_size;
+    uint8_t *spd_data;
+    Error *err = NULL;
     int64_t kernel_entry;
     PCIBus *pci_bus;
     ISABus *isa_bus;
@@ -306,7 +294,7 @@ static void mips_fulong2e_init(MachineState *machine)
 
     qemu_register_reset(main_cpu_reset, cpu);
 
-    /* fulong 2e has 256M ram. */
+    /* TODO: support more than 256M RAM as highmem */
     ram_size = 256 * MiB;
 
     /* allocate RAM */
@@ -359,8 +347,14 @@ static void mips_fulong2e_init(MachineState *machine)
     vt82c686b_southbridge_init(pci_bus, FULONG2E_VIA_SLOT, env->irq[5],
                                &smbus, &isa_bus);
 
-    /* TODO: Populate SPD eeprom data.  */
-    smbus_eeprom_init(smbus, 1, eeprom_spd, sizeof(eeprom_spd));
+    /* Populate SPD eeprom data */
+    spd_data = spd_data_generate(DDR, ram_size, &err);
+    if (err) {
+        warn_report_err(err);
+    }
+    if (spd_data) {
+        smbus_eeprom_init_one(smbus, 0x50, spd_data);
+    }
 
     mc146818_rtc_init(isa_bus, 2000, NULL);
 
@@ -374,6 +368,7 @@ static void mips_fulong2e_machine_init(MachineClass *mc)
     mc->init = mips_fulong2e_init;
     mc->block_default_type = IF_IDE;
     mc->default_cpu_type = MIPS_CPU_TYPE_NAME("Loongson-2E");
+    mc->default_ram_size = 256 * MiB;
 }
 
 DEFINE_MACHINE("fulong2e", mips_fulong2e_machine_init)
-- 
2.13.7