[PATCH 0/7] hw/mips/fuloong2e fixes

[PATCH 0/7] hw/mips/fuloong2e fixes

[Jiaxun Yang]

It can now boot Debian installer[1].
I'm going to add acceptance test for it later.

Thanks.

Jiaxun Yang (7):
  hw/mips/fuloong2e: Remove define DEBUG_FULOONG2E_INIT
  hw/mips/fuloong2e: Relpace fault links
  hw/pci-host/bonito: Fixup IRQ mapping
  hw/pci-host/bonito: Fixup pci.lomem mapping
  hw/mips/fuloong2e: Remove unused env entry
  hw/mips/fuloong2e: Correct cpuclock env
  hw/mips/fuloong2e: Add highmem support

 hw/mips/fuloong2e.c  | 68 ++++++++++++++++++++++++++++----------------
 hw/pci-host/bonito.c | 45 +++++++----------------------
 2 files changed, 54 insertions(+), 59 deletions(-)

-- 
2.29.2

[PATCH 1/7] hw/mips/fuloong2e: Remove define DEBUG_FULOONG2E_INIT

[Jiaxun Yang]

Seems useless....

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/mips/fuloong2e.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index 9b0eb8a314..055b99e378 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -48,8 +48,6 @@
 #include "sysemu/reset.h"
 #include "qemu/error-report.h"
 
-#define DEBUG_FULOONG2E_INIT
-
 #define ENVP_PADDR              0x2000
 #define ENVP_VADDR              cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
 #define ENVP_NB_ENTRIES         16
-- 
2.29.2

Re: [PATCH 1/7] hw/mips/fuloong2e: Remove define DEBUG_FULOONG2E_INIT

[Philippe Mathieu-Daudé]

On 12/16/20 3:25 AM, Jiaxun Yang wrote:
> Seems useless....

Indeed, introduced in 051c190bce5 ("MIPS: Initial support of
fulong mini pc (machine construction)") but never used.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> ---
>  hw/mips/fuloong2e.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
> index 9b0eb8a314..055b99e378 100644
> --- a/hw/mips/fuloong2e.c
> +++ b/hw/mips/fuloong2e.c
> @@ -48,8 +48,6 @@
>  #include "sysemu/reset.h"
>  #include "qemu/error-report.h"
>  
> -#define DEBUG_FULOONG2E_INIT
> -
>  #define ENVP_PADDR              0x2000
>  #define ENVP_VADDR              cpu_mips_phys_to_kseg0(NULL, ENVP_PADDR)
>  #define ENVP_NB_ENTRIES         16
> 

[PATCH 2/7] hw/mips/fuloong2e: Relpace fault links

[Jiaxun Yang]

Websites are downing, but GitHub may last forever.
Loongson even doesn't recogonize 2E as their products nowadays..

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/mips/fuloong2e.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index 055b99e378..a5b75b230a 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -14,8 +14,8 @@
  * Fuloong 2e mini pc is based on ICT/ST Loongson 2e CPU (MIPS III like, 800MHz)
  * https://www.linux-mips.org/wiki/Fuloong_2E
  *
- * Loongson 2e user manual:
- * http://www.loongsondeveloper.com/doc/Loongson2EUserGuide.pdf
+ * Loongson 2e manuals:
+ * https://github.com/loongson-community/docs/tree/master/2E
  */
 
 #include "qemu/osdep.h"
@@ -61,14 +61,7 @@
  * PMON is not part of qemu and released with BSD license, anyone
  * who want to build a pmon binary please first git-clone the source
  * from the git repository at:
- * http://www.loongson.cn/support/git/pmon
- * Then follow the "Compile Guide" available at:
- * http://dev.lemote.com/code/pmon
- *
- * Notes:
- * 1, don't use the source at http://dev.lemote.com/http_git/pmon.git
- * 2, use "Bonito2edev" to replace "dir_corresponding_to_your_target_hardware"
- * in the "Compile Guide".
+ * https://github.com/loongson-community/pmon-2ef
  */
 #define FULOONG_BIOSNAME "pmon_2e.bin"
 
-- 
2.29.2

[PATCH 3/7] hw/pci-host/bonito: Fixup IRQ mapping

[Jiaxun Yang]

Accroading to arch/mips/pci/fixup-fuloong2e.c in kernel,
despites south bridge IRQs needs special care, all other
IRQ pins are mapped by 'LOONGSON_IRQ_BASE + 25 + pin'.

As south bridge IRQs are all handled by ISA bus, we can simply
remove BONITO_IRQ_BASE and direct map IRQs here.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/pci-host/bonito.c | 28 +++++-----------------------
 1 file changed, 5 insertions(+), 23 deletions(-)

diff --git a/hw/pci-host/bonito.c b/hw/pci-host/bonito.c
index a99eced065..43b79448a9 100644
--- a/hw/pci-host/bonito.c
+++ b/hw/pci-host/bonito.c
@@ -546,19 +546,16 @@ static const MemoryRegionOps bonito_spciconf_ops = {
     .endianness = DEVICE_NATIVE_ENDIAN,
 };
 
-#define BONITO_IRQ_BASE 32
-
 static void pci_bonito_set_irq(void *opaque, int irq_num, int level)
 {
     BonitoState *s = opaque;
     qemu_irq *pic = s->pic;
     PCIBonitoState *bonito_state = s->pci_dev;
-    int internal_irq = irq_num - BONITO_IRQ_BASE;
 
-    if (bonito_state->regs[BONITO_INTEDGE] & (1 << internal_irq)) {
+    if (bonito_state->regs[BONITO_INTEDGE] & (1 << irq_num)) {
         qemu_irq_pulse(*pic);
     } else {   /* level triggered */
-        if (bonito_state->regs[BONITO_INTPOL] & (1 << internal_irq)) {
+        if (bonito_state->regs[BONITO_INTPOL] & (1 << irq_num)) {
             qemu_irq_raise(*pic);
         } else {
             qemu_irq_lower(*pic);
@@ -566,25 +563,10 @@ static void pci_bonito_set_irq(void *opaque, int irq_num, int level)
     }
 }
 
-/* map the original irq (0~3) to bonito irq (16~47, but 16~31 are unused) */
-static int pci_bonito_map_irq(PCIDevice *pci_dev, int irq_num)
+/* PCI slots IRQ pins started from 25 */
+static int pci_bonito_map_irq(PCIDevice *pci_dev, int pin)
 {
-    int slot;
-
-    slot = (pci_dev->devfn >> 3);
-
-    switch (slot) {
-    case 5:   /* FULOONG2E_VIA_SLOT, SouthBridge, IDE, USB, ACPI, AC97, MC97 */
-        return irq_num % 4 + BONITO_IRQ_BASE;
-    case 6:   /* FULOONG2E_ATI_SLOT, VGA */
-        return 4 + BONITO_IRQ_BASE;
-    case 7:   /* FULOONG2E_RTL_SLOT, RTL8139 */
-        return 5 + BONITO_IRQ_BASE;
-    case 8 ... 12: /* PCI slot 1 to 4 */
-        return (slot - 8 + irq_num) + 6 + BONITO_IRQ_BASE;
-    default:  /* Unknown device, don't do any translation */
-        return irq_num;
-    }
+    return 25 + pin;
 }
 
 static void bonito_reset(void *opaque)
-- 
2.29.2

[PATCH 4/7] hw/pci-host/bonito: Fixup pci.lomem mapping

[Jiaxun Yang]

The original mapping had wrong base address.
Fix by correct the base adress and merge three alias into
a single.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/pci-host/bonito.c | 17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

diff --git a/hw/pci-host/bonito.c b/hw/pci-host/bonito.c
index 43b79448a9..3a31ba42f2 100644
--- a/hw/pci-host/bonito.c
+++ b/hw/pci-host/bonito.c
@@ -608,7 +608,7 @@ static void bonito_pcihost_realize(DeviceState *dev, Error **errp)
 {
     PCIHostState *phb = PCI_HOST_BRIDGE(dev);
     BonitoState *bs = BONITO_PCI_HOST_BRIDGE(dev);
-    MemoryRegion *pcimem_lo_alias = g_new(MemoryRegion, 3);
+    MemoryRegion *pcimem_lo_alias = g_new(MemoryRegion, 1);
 
     memory_region_init(&bs->pci_mem, OBJECT(dev), "pci.mem", BONITO_PCIHI_SIZE);
     phb->bus = pci_register_root_bus(dev, "pci",
@@ -616,16 +616,11 @@ static void bonito_pcihost_realize(DeviceState *dev, Error **errp)
                                      dev, &bs->pci_mem, get_system_io(),
                                      0x28, 32, TYPE_PCI_BUS);
 
-    for (size_t i = 0; i < 3; i++) {
-        char *name = g_strdup_printf("pci.lomem%zu", i);
-
-        memory_region_init_alias(&pcimem_lo_alias[i], NULL, name,
-                                 &bs->pci_mem, i * 64 * MiB, 64 * MiB);
-        memory_region_add_subregion(get_system_memory(),
-                                    BONITO_PCILO_BASE + i * 64 * MiB,
-                                    &pcimem_lo_alias[i]);
-        g_free(name);
-    }
+    memory_region_init_alias(pcimem_lo_alias, OBJECT(dev), "pci.lomem",
+                             &bs->pci_mem, BONITO_PCILO_BASE,
+                             BONITO_PCILO_SIZE);
+    memory_region_add_subregion(get_system_memory(), BONITO_PCILO_BASE,
+                                pcimem_lo_alias);
 
     create_unimplemented_device("pci.io", BONITO_PCIIO_BASE, 1 * MiB);
 }
-- 
2.29.2

[PATCH 5/7] hw/mips/fuloong2e: Remove unused env entry

[Jiaxun Yang]

modetty and busclock is not handled by kernel and the parameter
here seems unreasonable.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/mips/fuloong2e.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index a5b75b230a..256c7867e4 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -159,10 +159,8 @@ static uint64_t load_kernel(CPUMIPSState *env)
     }
 
     /* Setup minimum environment variables */
-    prom_set(prom_buf, index++, "busclock=33000000");
     prom_set(prom_buf, index++, "cpuclock=100000000");
     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
-    prom_set(prom_buf, index++, "modetty0=38400n8r");
     prom_set(prom_buf, index++, NULL);
 
     rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
-- 
2.29.2

[PATCH 6/7] hw/mips/fuloong2e: Correct cpuclock env

[Jiaxun Yang]

It should be 533080000.
See clock_set_hz.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/mips/fuloong2e.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index 256c7867e4..af2d259dc4 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -159,7 +159,7 @@ static uint64_t load_kernel(CPUMIPSState *env)
     }
 
     /* Setup minimum environment variables */
-    prom_set(prom_buf, index++, "cpuclock=100000000");
+    prom_set(prom_buf, index++, "cpuclock=533080000");
     prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
     prom_set(prom_buf, index++, NULL);
 
-- 
2.29.2

Re: [PATCH 6/7] hw/mips/fuloong2e: Correct cpuclock env

[Philippe Mathieu-Daudé]

On 12/16/20 3:31 AM, Jiaxun Yang wrote:
> It should be 533080000.
> See clock_set_hz.

Missed in 3ca7639ff00 ("hw/mips/fuloong2e: Set CPU frequency
to 533 MHz").

> 
> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
> ---
>  hw/mips/fuloong2e.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
> index 256c7867e4..af2d259dc4 100644
> --- a/hw/mips/fuloong2e.c
> +++ b/hw/mips/fuloong2e.c
> @@ -159,7 +159,7 @@ static uint64_t load_kernel(CPUMIPSState *env)
>      }
>  
>      /* Setup minimum environment variables */
> -    prom_set(prom_buf, index++, "cpuclock=100000000");
> +    prom_set(prom_buf, index++, "cpuclock=533080000");

Actually it should be "cpuclock=%u" of clock_get_hz(cpuclk).

>      prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
>      prom_set(prom_buf, index++, NULL);
>  
> 

[PATCH 7/7] hw/mips/fuloong2e: Add highmem support

[Jiaxun Yang]

highmem started from 0x20000000.
Now we can have up to 2G RAM.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
 hw/mips/fuloong2e.c | 49 ++++++++++++++++++++++++++++++++++++---------
 1 file changed, 39 insertions(+), 10 deletions(-)

diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index af2d259dc4..dec6ac3b13 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -56,6 +56,7 @@
 /* Fuloong 2e has a 512k flash: Winbond W39L040AP70Z */
 #define BIOS_SIZE               (512 * KiB)
 #define MAX_IDE_BUS             2
+#define HIGHMEM_START           0x20000000
 
 /*
  * PMON is not part of qemu and released with BSD license, anyone
@@ -71,7 +72,8 @@
 #define FULOONG2E_RTL8139_SLOT    7
 
 static struct _loaderparams {
-    int ram_size;
+    int ram_low_size;
+    int ram_high_size;
     const char *kernel_filename;
     const char *kernel_cmdline;
     const char *initrd_filename;
@@ -128,14 +130,14 @@ static uint64_t load_kernel(CPUMIPSState *env)
         initrd_size = get_image_size(loaderparams.initrd_filename);
         if (initrd_size > 0) {
             initrd_offset = ROUND_UP(kernel_high, INITRD_PAGE_SIZE);
-            if (initrd_offset + initrd_size > loaderparams.ram_size) {
+            if (initrd_offset + initrd_size > loaderparams.ram_low_size) {
                 error_report("memory too small for initial ram disk '%s'",
                              loaderparams.initrd_filename);
                 exit(1);
             }
             initrd_size = load_image_targphys(loaderparams.initrd_filename,
                                               initrd_offset,
-                                              loaderparams.ram_size - initrd_offset);
+                                              loaderparams.ram_low_size - initrd_offset);
         }
         if (initrd_size == (target_ulong) -1) {
             error_report("could not load initial ram disk '%s'",
@@ -160,7 +162,11 @@ static uint64_t load_kernel(CPUMIPSState *env)
 
     /* Setup minimum environment variables */
     prom_set(prom_buf, index++, "cpuclock=533080000");
-    prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_size / MiB);
+    prom_set(prom_buf, index++, "memsize=%"PRIi64, loaderparams.ram_low_size / MiB);
+    if (loaderparams.ram_high_size > 0) {
+            prom_set(prom_buf, index++, "highmemsize=%"PRIi64,
+                    loaderparams.ram_high_size / MiB);
+    }
     prom_set(prom_buf, index++, NULL);
 
     rom_add_blob_fixed("prom", prom_buf, prom_size, ENVP_PADDR);
@@ -186,7 +192,7 @@ static void write_bootloader(CPUMIPSState *env, uint8_t *base,
     p = (uint32_t *)(base + 0x040);
 
     bl_gen_jump_kernel(&p, ENVP_VADDR - 64, 2, ENVP_VADDR,
-                       ENVP_VADDR + 8, loaderparams.ram_size,
+                       ENVP_VADDR + 8, loaderparams.ram_low_size,
                        kernel_addr);
 }
 
@@ -258,8 +264,11 @@ static void mips_fuloong2e_init(MachineState *machine)
     const char *kernel_filename = machine->kernel_filename;
     const char *kernel_cmdline = machine->kernel_cmdline;
     const char *initrd_filename = machine->initrd_filename;
+    ram_addr_t ram_low_size, ram_high_size = 0;
     char *filename;
     MemoryRegion *address_space_mem = get_system_memory();
+    MemoryRegion *ram_low_alias = g_new(MemoryRegion, 1);
+    MemoryRegion *ram_high_alias;
     MemoryRegion *bios = g_new(MemoryRegion, 1);
     long bios_size;
     uint8_t *spd_data;
@@ -282,12 +291,31 @@ static void mips_fuloong2e_init(MachineState *machine)
 
     qemu_register_reset(main_cpu_reset, cpu);
 
-    /* TODO: support more than 256M RAM as highmem */
-    if (machine->ram_size != 256 * MiB) {
-        error_report("Invalid RAM size, should be 256MB");
+    if (machine->ram_size > 2 * GiB) {
+        error_report("Too much memory for this machine: %" PRId64 "MB,"
+                     " maximum 2048MB", machine->ram_size / MiB);
         exit(EXIT_FAILURE);
     }
-    memory_region_add_subregion(address_space_mem, 0, machine->ram);
+
+    ram_low_size = MIN(machine->ram_size, 256 * MiB);
+
+    memory_region_init_alias(ram_low_alias, NULL,
+                            "ram_low_alias",
+                            machine->ram, 0,
+                            ram_low_size);
+    memory_region_add_subregion(address_space_mem, 0,
+                                ram_low_alias);
+ 
+    if (machine->ram_size > 256 * MiB) {
+        ram_high_alias = g_new(MemoryRegion, 1);
+        ram_high_size = machine->ram_size - ram_low_size;
+        memory_region_init_alias(ram_high_alias, NULL,
+                                "ram_high_alias",
+                                machine->ram, ram_low_size,
+                                ram_high_size);
+        memory_region_add_subregion(address_space_mem, HIGHMEM_START,
+                                    ram_high_alias);
+    }
 
     /* Boot ROM */
     memory_region_init_rom(bios, NULL, "fuloong2e.bios", BIOS_SIZE,
@@ -300,7 +328,8 @@ static void mips_fuloong2e_init(MachineState *machine)
      */
 
     if (kernel_filename) {
-        loaderparams.ram_size = machine->ram_size;
+        loaderparams.ram_low_size = ram_low_size;
+        loaderparams.ram_high_size = ram_high_size;
         loaderparams.kernel_filename = kernel_filename;
         loaderparams.kernel_cmdline = kernel_cmdline;
         loaderparams.initrd_filename = initrd_filename;
-- 
2.29.2