---

yaml
---
r: 274186
b: refs/heads/master
c: daea117
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 6e35d5dac0c83ebb616ff3b9c2d6155c9a9ccb86
+refs/heads/master: daea1175a9f0f70eab5b33e2827d57ba8c686816

trunk/arch/powerpc/Kconfig.debug

@@ -265,8 +265,27 @@ config PPC_EARLY_DEBUG_PS3GELIC
 	  Select this to enable early debugging for the PlayStation3 via
 	  UDP broadcasts sent out through the Ethernet port.
 
+config PPC_EARLY_DEBUG_OPAL_RAW
+	bool "OPAL raw console"
+	depends on HVC_OPAL
+	help
+	  Select this to enable early debugging for the PowerNV platform
+	  using a "raw" console
+
+config PPC_EARLY_DEBUG_OPAL_HVSI
+	bool "OPAL hvsi console"
+	depends on HVC_OPAL
+	help
+	  Select this to enable early debugging for the PowerNV platform
+	  using an "hvsi" console
+
 endchoice
 
+config PPC_EARLY_DEBUG_OPAL
+	def_bool y
+	depends on PPC_EARLY_DEBUG_OPAL_RAW || PPC_EARLY_DEBUG_OPAL_HVSI
+
+
 config PPC_EARLY_DEBUG_HVSI_VTERMNO
 	hex "vterm number to use with early debug HVSI"
 	depends on PPC_EARLY_DEBUG_LPAR_HVSI
@@ -275,6 +294,18 @@ config PPC_EARLY_DEBUG_HVSI_VTERMNO
 	  You probably want 0x30000000 for your first serial port and
 	  0x30000001 for your second one
 
+config PPC_EARLY_DEBUG_OPAL_VTERMNO
+	hex "vterm number to use with OPAL early debug"
+	depends on PPC_EARLY_DEBUG_OPAL
+	default "0"
+	help
+	  This correspond to which /dev/hvcN you want to use for early
+	  debug.
+
+	  On OPAL v1 (takeover) this should always be 0
+	  On OPAL v2, this will be 0 for network console and 1 or 2 for
+	  the machine built-in serial ports.
+
 config PPC_EARLY_DEBUG_44x_PHYSLOW
 	hex "Low 32 bits of early debug UART physical address"
 	depends on PPC_EARLY_DEBUG_44x

trunk/arch/powerpc/include/asm/opal.h

@@ -425,6 +425,11 @@ extern void hvc_opal_init_early(void);
 extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
 				   int depth, void *data);
 
+extern int opal_get_chars(uint32_t vtermno, char *buf, int count);
+extern int opal_put_chars(uint32_t vtermno, const char *buf, int total_len);
+
+extern void hvc_opal_init_early(void);
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* __OPAL_H */

trunk/arch/powerpc/include/asm/udbg.h

@@ -55,6 +55,8 @@ extern void __init udbg_init_cpm(void);
 extern void __init udbg_init_usbgecko(void);
 extern void __init udbg_init_wsp(void);
 extern void __init udbg_init_ps3gelic(void);
+extern void __init udbg_init_debug_opal_raw(void);
+extern void __init udbg_init_debug_opal_hvsi(void);
 
 #endif /* __KERNEL__ */
 #endif /* _ASM_POWERPC_UDBG_H */

trunk/arch/powerpc/kernel/head_64.S

@@ -53,7 +53,8 @@
  *   2. The kernel is entered at __start
  * -or- For OPAL entry:
  *   1. The MMU is off, processor in HV mode, primary CPU enters at 0
- *      with device-tree in gpr3
+ *      with device-tree in gpr3. We also get OPAL base in r8 and
+ *	entry in r9 for debugging purposes
  *   2. Secondary processors enter at 0x60 with PIR in gpr3
  *
  *  For iSeries:
@@ -335,6 +336,11 @@ _GLOBAL(__start_initialization_multiplatform)
 	/* Save parameters */
 	mr	r31,r3
 	mr	r30,r4
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
+	/* Save OPAL entry */
+	mr	r28,r8
+	mr	r29,r9
+#endif
 
 #ifdef CONFIG_PPC_BOOK3E
 	bl	.start_initialization_book3e
@@ -711,6 +717,12 @@ _INIT_STATIC(start_here_multiplatform)
 	bdnz	3b
 4:
 
+#ifdef CONFIG_PPC_EARLY_DEBUG_OPAL
+	/* Setup OPAL entry */
+	std	r28,0(r11);
+	std	r29,8(r11);
+#endif
+
 #ifndef CONFIG_PPC_BOOK3E
 	mfmsr	r6
 	ori	r6,r6,MSR_RI

trunk/arch/powerpc/kernel/udbg.c

@@ -69,6 +69,10 @@ void __init udbg_early_init(void)
 	udbg_init_wsp();
 #elif defined(CONFIG_PPC_EARLY_DEBUG_PS3GELIC)
 	udbg_init_ps3gelic();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_RAW)
+	udbg_init_debug_opal_raw();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_OPAL_HVSI)
+	udbg_init_debug_opal_hvsi();
 #endif
 
 #ifdef CONFIG_PPC_EARLY_DEBUG

trunk/arch/powerpc/platforms/powernv/opal.c

@@ -67,7 +67,7 @@ int opal_get_chars(uint32_t vtermno, char *buf, int count)
 	u64 evt;
 
 	if (!opal.entry)
-		return 0;
+		return -ENODEV;
 	opal_poll_events(&evt);
 	if ((evt & OPAL_EVENT_CONSOLE_INPUT) == 0)
 		return 0;
@@ -81,31 +81,38 @@ int opal_get_chars(uint32_t vtermno, char *buf, int count)
 int opal_put_chars(uint32_t vtermno, const char *data, int total_len)
 {
 	int written = 0;
-	s64 len, rc = OPAL_BUSY;
+	s64 len, rc;
 	unsigned long flags;
 	u64 evt;
 
 	if (!opal.entry)
-		return 0;
+		return -ENODEV;
 
 	/* We want put_chars to be atomic to avoid mangling of hvsi
 	 * packets. To do that, we first test for room and return
-	 * -EAGAIN if there isn't enough
+	 * -EAGAIN if there isn't enough.
+	 *
+	 * Unfortunately, opal_console_write_buffer_space() doesn't
+	 * appear to work on opal v1, so we just assume there is
+	 * enough room and be done with it
 	 */
 	spin_lock_irqsave(&opal_write_lock, flags);
-	rc = opal_console_write_buffer_space(vtermno, &len);
-	if (rc || len < total_len) {
-		spin_unlock_irqrestore(&opal_write_lock, flags);
-		/* Closed -> drop characters */
-		if (rc)
-			return total_len;
-		opal_poll_events(&evt);
-		return -EAGAIN;
+	if (firmware_has_feature(FW_FEATURE_OPALv2)) {
+		rc = opal_console_write_buffer_space(vtermno, &len);
+		if (rc || len < total_len) {
+			spin_unlock_irqrestore(&opal_write_lock, flags);
+			/* Closed -> drop characters */
+			if (rc)
+				return total_len;
+			opal_poll_events(&evt);
+			return -EAGAIN;
+		}
 	}
 
 	/* We still try to handle partial completions, though they
 	 * should no longer happen.
 	 */
+	rc = OPAL_BUSY;
 	while(total_len > 0 && (rc == OPAL_BUSY ||
 				rc == OPAL_BUSY_EVENT || rc == OPAL_SUCCESS)) {
 		len = total_len;

trunk/arch/powerpc/platforms/powernv/setup.c

@@ -29,17 +29,12 @@
 #include <asm/machdep.h>
 #include <asm/firmware.h>
 #include <asm/xics.h>
+#include <asm/opal.h>
 
 #include "powernv.h"
 
 static void __init pnv_setup_arch(void)
 {
-	/* Force console to hvc for now until we have sorted out the
-	 * real console situation for the platform. This will make
-	 * hvc_udbg work at least.
-	 */
-	add_preferred_console("hvc", 0, NULL);
-
 	/* Initialize SMP */
 	pnv_smp_init();
 
@@ -55,7 +50,12 @@ static void __init pnv_setup_arch(void)
 
 static void __init pnv_init_early(void)
 {
-	/* XXX IOMMU */
+#ifdef CONFIG_HVC_OPAL
+	if (firmware_has_feature(FW_FEATURE_OPAL))
+		hvc_opal_init_early();
+	else
+#endif
+		add_preferred_console("hvc", 0, NULL);
 }
 
 static void __init pnv_init_IRQ(void)

trunk/drivers/tty/hvc/Kconfig

@@ -34,6 +34,15 @@ config HVC_ISERIES
 	help
 	  iSeries machines support a hypervisor virtual console.
 
+config HVC_OPAL
+	bool "OPAL Console support"
+	depends on PPC_POWERNV
+	select HVC_DRIVER
+	select HVC_IRQ
+	default y
+	help
+	  PowerNV machines running under OPAL need that driver to get a console
+
 config HVC_RTAS
 	bool "IBM RTAS Console support"
 	depends on PPC_RTAS

trunk/drivers/tty/hvc/Makefile

@@ -1,4 +1,5 @@
 obj-$(CONFIG_HVC_CONSOLE)	+= hvc_vio.o hvsi_lib.o
+obj-$(CONFIG_HVC_OPAL)		+= hvc_opal.o hvsi_lib.o
 obj-$(CONFIG_HVC_OLD_HVSI)	+= hvsi.o
 obj-$(CONFIG_HVC_ISERIES)	+= hvc_iseries.o
 obj-$(CONFIG_HVC_RTAS)		+= hvc_rtas.o