[PATCH 0/2] SPARC64: switch to MMIO NVRAM access

[Mark Cave-Ayland]

Happy New Year everyone!

This patchset is a minor rework of Artyom's patchset last year which when
combined with the corresponding QEMU patches fixes NVRAM/RTC access under
sun4u.

The modifications I've made to the orignal patches are:

1) Change NVRAM_BASE from 0x1000 to 0x2000

NetBSD has a bug where it incorrectly calculates the size of the VA mapping
if the NVRAM straddles a page. Fix this by setting the offset to 0x2000 instead
of 0x1000 to ensure the NVRAM mapping is aligned to an 8K page.

2) Fixup the eeprom node properties

With the introduction of the new PCI interrupt map, the format of the ebus
reg property has changed. Hence I've altered the second patch in the series 
to bring it in line with the existing ebus devices.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk>


Artyom Tarasenko (2):
  SPARC64: use MMIO for NVRAM access
  SPARC64: add an eeprom node to the device tree

 openbios-devel/arch/sparc64/openbios.c |   30 ++++++++----------------------
 openbios-devel/drivers/pci.c           |   20 ++++++++++++++++++++
 2 files changed, 28 insertions(+), 22 deletions(-)

-- 
1.7.10.4

[PATCH 1/2] SPARC64: use MMIO for NVRAM access

[Mark Cave-Ayland]

From: Artyom Tarasenko <atar4qemu(a)gmail.com>

Use MMIO for accessing the m48t59 NVRAM chip. This patch is a counterpart
of a QEMU change.

Signed-off-by: Artyom Tarasenko <atar4qemu(a)gmail.com>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk>
---
 openbios-devel/arch/sparc64/openbios.c |   30 ++++++++----------------------
 1 file changed, 8 insertions(+), 22 deletions(-)

diff --git a/openbios-devel/arch/sparc64/openbios.c
b/openbios-devel/arch/sparc64/openbios.c
index 3a36146..f07c0f3 100644
--- a/openbios-devel/arch/sparc64/openbios.c
+++ b/openbios-devel/arch/sparc64/openbios.c
@@ -27,9 +27,7 @@
 
 #define UUID_FMT
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x"
 
-#define NVRAM_ADDR_LO 0x74
-#define NVRAM_ADDR_HI 0x75
-#define NVRAM_DATA    0x77
+#define NVRAM_BASE    0x2000
 
 #define APB_SPECIAL_BASE     0x1fe00000000ULL
 #define APB_MEM_BASE         0x1ff00000000ULL
@@ -41,7 +39,7 @@
 #define NVRAM_IDPROM     0x1fd8
 #define NVRAM_IDPROM_SIZE 32
 #define NVRAM_OB_START   (0)
-#define NVRAM_OB_SIZE    ((0x1fd0 - NVRAM_OB_START) & ~15)
+#define NVRAM_OB_SIZE    ((NVRAM_IDPROM - NVRAM_OB_START) & ~15)
 
 static uint8_t idprom[NVRAM_IDPROM_SIZE];
 
@@ -352,34 +350,22 @@ id_cpu(void)
     for (;;);
 }
 
-static uint8_t nvram_read_byte(uint16_t offset)
-{
-    outb(offset & 0xff, NVRAM_ADDR_LO);
-    outb(offset >> 8, NVRAM_ADDR_HI);
-    return inb(NVRAM_DATA);
-}
-
 static void nvram_read(uint16_t offset, char *buf, unsigned int nbytes)
 {
     unsigned int i;
 
-    for (i = 0; i < nbytes; i++)
-        buf[i] = nvram_read_byte(offset + i);
-}
-
-static void nvram_write_byte(uint16_t offset, uint8_t val)
-{
-    outb(offset & 0xff, NVRAM_ADDR_LO);
-    outb(offset >> 8, NVRAM_ADDR_HI);
-    outb(val, NVRAM_DATA);
+    for (i = 0; i < nbytes; i++) {
+        buf[i] = inb(NVRAM_BASE + offset + i);
+    }
 }
 
 static void nvram_write(uint16_t offset, const char *buf, unsigned int nbytes)
 {
     unsigned int i;
 
-    for (i = 0; i < nbytes; i++)
-        nvram_write_byte(offset + i, buf[i]);
+    for (i = 0; i < nbytes; i++) {
+        outb(buf[i], NVRAM_BASE + offset + i);
+    }
 }
 
 static uint8_t qemu_uuid[16];
-- 
1.7.10.4

[PATCH 2/2] SPARC64: add an eeprom node to the device tree

[Mark Cave-Ayland]

From: Artyom Tarasenko <atar4qemu(a)gmail.com>

Add eeprom node to the device tree to make device visible for
the guest OS.

Signed-off-by: Artyom Tarasenko <atar4qemu(a)gmail.com>
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk>
---
 openbios-devel/drivers/pci.c |   20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/openbios-devel/drivers/pci.c b/openbios-devel/drivers/pci.c
index 3260354..366f4a1 100644
--- a/openbios-devel/drivers/pci.c
+++ b/openbios-devel/drivers/pci.c
@@ -831,6 +831,26 @@ int ebus_config_cb(const pci_config_t *config)
 
     set_property(dev, "ranges", (char *)props, ncells * sizeof(props[0]));
 
+    /*  Build eeprom node */
+    fword("new-device");
+    PUSH(0x14);
+    fword("encode-int");
+    PUSH(0x2000);
+    fword("encode-int");
+    fword("encode+");
+    PUSH(0x2000);
+    fword("encode-int");
+    fword("encode+");
+    push_str("reg");
+    fword("property");
+
+    push_str("mk48t59");
+    fword("model");
+
+    push_str("eeprom");
+    fword("device-name");
+    fword("finish-device");
+
 #ifdef CONFIG_DRIVER_FLOPPY
     ob_floppy_init(config->path, "fdthree", 0x3f0ULL, 0);
 #endif
-- 
1.7.10.4

[PATCH 2/2] SPARC64: add an eeprom node to the device tree

[Artyom Tarasenko]

Hi Mark,

back then I was in a hurry to get it in an upcoming release. Now as we
are not in a rush...

On Mon, Jan 19, 2015 at 2:09 PM, Mark Cave-Ayland
<mark.cave-ayland(a)ilande.co.uk> wrote:
  From: Artyom Tarasenko <atar4qemu(a)gmail.com>

 Add eeprom node to the device tree to make device visible for
 the guest OS.

 Signed-off-by: Artyom Tarasenko <atar4qemu(a)gmail.com>
 Signed-off-by: Mark Cave-Ayland <mark.cave-ayland(a)ilande.co.uk>
 ---
  openbios-devel/drivers/pci.c |   20 ++++++++++++++++++++
  1 file changed, 20 insertions(+)

 diff --git a/openbios-devel/drivers/pci.c b/openbios-devel/drivers/pci.c
 index 3260354..366f4a1 100644
 --- a/openbios-devel/drivers/pci.c
 +++ b/openbios-devel/drivers/pci.c
 @@ -831,6 +831,26 @@ int ebus_config_cb(const pci_config_t *config)

      set_property(dev, "ranges", (char *)props, ncells * sizeof(props[0]));

 +    /*  Build eeprom node */
 +    fword("new-device");
 +    PUSH(0x14);
 +    fword("encode-int");
 +    PUSH(0x2000);
PUSH(NVRAM_BASE)

  +    fword("encode-int");
 +    fword("encode+");
 +    PUSH(0x2000);
PUSH(NVRAM_SIZE);

  +    fword("encode-int");
 +    fword("encode+");
 +    push_str("reg");
 +    fword("property");
 +
 +    push_str("mk48t59");
 +    fword("model");
 +
 +    push_str("eeprom");
 +    fword("device-name");
 +    fword("finish-device");
 +
  #ifdef CONFIG_DRIVER_FLOPPY
      ob_floppy_init(config->path, "fdthree", 0x3f0ULL, 0);
  #endif
 --
 1.7.10.4
Artyom

-- 
Regards,
Artyom Tarasenko

SPARC and PPC PReP under qemu blog: http://tyom.blogspot.com/search/label/qemu