From: Kumar Gala <galak@freescale.com>
Date: Sat, 28 May 2005 22:52:06 +0000 (-0700)
Subject: [PATCH] ppc32: Fix some minor issues related to FSL Book-E KGDB support
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=252fcaed48fc5473b3fc3cafbf977244b0cbf670;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

[PATCH] ppc32: Fix some minor issues related to FSL Book-E KGDB support

Some debug registers needed to be initialized early on to allow proper
support for KGDB.  Additionally, we need to setup the
ppc.md_early_serial_map function pointer on boards that have serial support
for KGDB.

Signed-off-by: Kumar Gala <kumar.gala@freescale.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/arch/ppc/kernel/head_fsl_booke.S b/arch/ppc/kernel/head_fsl_booke.S
index f22ddce36135..ce36e88ba627 100644
--- a/arch/ppc/kernel/head_fsl_booke.S
+++ b/arch/ppc/kernel/head_fsl_booke.S
@@ -232,7 +232,8 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	tlbwe
 
 /* 7. Jump to KERNELBASE mapping */
-	li	r7,0
+	lis	r7,MSR_KERNEL@h
+	ori	r7,r7,MSR_KERNEL@l
 	bl	1f			/* Find our address */
 1:	mflr	r9
 	rlwimi	r6,r9,0,20,31
@@ -293,6 +294,18 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	mtspr	SPRN_HID0, r2
 #endif
 
+#if !defined(CONFIG_BDI_SWITCH)
+	/*
+	 * The Abatron BDI JTAG debugger does not tolerate others
+	 * mucking with the debug registers.
+	 */
+	lis	r2,DBCR0_IDM@h
+	mtspr	SPRN_DBCR0,r2
+	/* clear any residual debug events */
+	li	r2,-1
+	mtspr	SPRN_DBSR,r2
+#endif
+
 	/*
 	 * This is where the main kernel code starts.
 	 */
diff --git a/arch/ppc/platforms/85xx/mpc8540_ads.c b/arch/ppc/platforms/85xx/mpc8540_ads.c
index 4d857d6d633d..583838ab02d8 100644
--- a/arch/ppc/platforms/85xx/mpc8540_ads.c
+++ b/arch/ppc/platforms/85xx/mpc8540_ads.c
@@ -210,6 +210,9 @@ platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 #if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
 	ppc_md.progress = gen550_progress;
 #endif	/* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
+#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
+	ppc_md.early_serial_map = mpc85xx_early_serial_map;
+#endif	/* CONFIG_SERIAL_8250 && CONFIG_KGDB */
 
 	if (ppc_md.progress)
 		ppc_md.progress("mpc8540ads_init(): exit", 0);
diff --git a/arch/ppc/platforms/85xx/mpc85xx_cds_common.c b/arch/ppc/platforms/85xx/mpc85xx_cds_common.c
index 6c020d67ad70..11fb758d269f 100644
--- a/arch/ppc/platforms/85xx/mpc85xx_cds_common.c
+++ b/arch/ppc/platforms/85xx/mpc85xx_cds_common.c
@@ -459,6 +459,9 @@ platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 #if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
 	ppc_md.progress = gen550_progress;
 #endif /* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
+#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
+	ppc_md.early_serial_map = mpc85xx_early_serial_map;
+#endif	/* CONFIG_SERIAL_8250 && CONFIG_KGDB */
 
 	if (ppc_md.progress)
 		ppc_md.progress("mpc85xx_cds_init(): exit", 0);
diff --git a/arch/ppc/platforms/85xx/sbc8560.c b/arch/ppc/platforms/85xx/sbc8560.c
index 9ab05e590c3e..7b9e1543e175 100644
--- a/arch/ppc/platforms/85xx/sbc8560.c
+++ b/arch/ppc/platforms/85xx/sbc8560.c
@@ -221,6 +221,9 @@ platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
 #if defined(CONFIG_SERIAL_8250) && defined(CONFIG_SERIAL_TEXT_DEBUG)
 	ppc_md.progress = gen550_progress;
 #endif	/* CONFIG_SERIAL_8250 && CONFIG_SERIAL_TEXT_DEBUG */
+#if defined(CONFIG_SERIAL_8250) && defined(CONFIG_KGDB)
+	ppc_md.early_serial_map = sbc8560_early_serial_map;
+#endif	/* CONFIG_SERIAL_8250 && CONFIG_KGDB */
 
 	if (ppc_md.progress)
 		ppc_md.progress("sbc8560_init(): exit", 0);