hw/hppa: Tell SeaBIOS port address of fw_cfg

Change QEMU_FW_CFG_IO_BASE to shorter variant FW_CFG_IO_BASE and hand
over the actual port address in %r19 to SeaBIOS.

Signed-off-by: Helge Deller <deller@gmx.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

hw/hppa/hppa_hardware.h

@@ -38,7 +38,7 @@
 #define PORT_PCI_CMD    (PCI_HPA + DINO_PCI_ADDR)
 #define PORT_PCI_DATA   (PCI_HPA + DINO_CONFIG_DATA)
 
-#define QEMU_FW_CFG_IO_BASE     0xfffa0000
+#define FW_CFG_IO_BASE  0xfffa0000
 
 #define PORT_SERIAL1    (DINO_UART_HPA + 0x800)
 #define PORT_SERIAL2    (LASI_UART_HPA + 0x800)

hw/hppa/machine.c

@@ -69,7 +69,7 @@ static FWCfgState *create_fw_cfg(MachineState *ms)
     FWCfgState *fw_cfg;
     uint64_t val;
 
-    fw_cfg = fw_cfg_init_mem(QEMU_FW_CFG_IO_BASE, QEMU_FW_CFG_IO_BASE + 4);
+    fw_cfg = fw_cfg_init_mem(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4);
     fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, ms->smp.cpus);
     fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, HPPA_MAX_CPUS);
     fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, ram_size);
@@ -290,6 +290,9 @@ static void machine_hppa_init(MachineState *machine)
 
     /* tell firmware how many SMP CPUs to present in inventory table */
     cpu[0]->env.gr[21] = smp_cpus;
+
+    /* tell firmware fw_cfg port */
+    cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
 }
 
 static void hppa_machine_reset(MachineState *ms)
@@ -317,6 +320,8 @@ static void hppa_machine_reset(MachineState *ms)
     cpu[0]->env.gr[24] = 'c';
     /* gr22/gr23 unused, no initrd while reboot. */
     cpu[0]->env.gr[21] = smp_cpus;
+    /* tell firmware fw_cfg port */
+    cpu[0]->env.gr[19] = FW_CFG_IO_BASE;
 }