powerpc/SECURE_BOOT: Add PAMU driver

PAMU driver basic support for usage in Secure Boot.
In secure boot PAMU is not in bypass mode. Hence to use
any peripheral (SEC Job ring in our case), PAMU has to be
configured.

The patch reverts commit 7cad2e38d61e27ea59fb7944f7e647e97ef292d3.

The Header file pamu.h and few functions in driver have been derived
from Freescale Libos.

Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Signed-off-by: Aneesh Bansal <aneesh.bansal@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

2 files changed, 187 insertions, 1 deletions

diff --git a/arch/powerpc/include/asm/fsl_pamu.h b/arch/powerpc/include/asm/fsl_pamu.h
new file mode 100644
index 0000000000..93a7cae972
--- /dev/null
+++ b/arch/powerpc/include/asm/fsl_pamu.h
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2012-2016 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __PAMU_H
+#define __PAMU_H
+
+#define CONFIG_NUM_PAMU		16
+#define NUM_PPAACT_ENTRIES	512
+#define NUM_SPAACT_ENTRIES	256
+
+/* PAMU_OFFSET to the next pamu space in ccsr */
+#define PAMU_OFFSET 0x1000
+
+#define PAMU_TABLE_ALIGNMENT 0x00001000
+
+#define PAMU_PAGE_SHIFT 12
+#define PAMU_PAGE_SIZE  4096U
+
+#define PAACE_M_COHERENCE_REQ   0x01
+
+#define PAACE_DA_HOST_CR                0x80
+#define PAACE_DA_HOST_CR_SHIFT          7
+
+#define PAACE_AF_PT                     0x00000002
+#define PAACE_AF_PT_SHIFT               1
+
+#define PAACE_PT_PRIMARY       0x0
+#define PAACE_PT_SECONDARY     0x1
+
+#define PPAACE_AF_WBAL			0xfffff000
+#define PPAACE_AF_WBAL_SHIFT		12
+
+#define	OME_NUMBER_ENTRIES      16   /* based on P4080 2.0 silicon plan */
+
+#define PAACE_IA_CID			0x00FF0000
+#define PAACE_IA_CID_SHIFT		16
+#define PAACE_IA_WCE			0x000000F0
+#define PAACE_IA_WCE_SHIFT		4
+#define PAACE_IA_ATM			0x0000000C
+#define PAACE_IA_ATM_SHIFT		2
+#define PAACE_IA_OTM			0x00000003
+#define PAACE_IA_OTM_SHIFT		0
+
+#define PAACE_OTM_NO_XLATE      0x00
+#define PAACE_OTM_IMMEDIATE     0x01
+#define PAACE_OTM_INDEXED       0x02
+#define PAACE_OTM_RESERVED      0x03
+#define PAACE_ATM_NO_XLATE      0x00
+#define PAACE_ATM_WINDOW_XLATE  0x01
+#define PAACE_ATM_PAGE_XLATE    0x02
+#define PAACE_ATM_WIN_PG_XLATE  \
+	(PAACE_ATM_WINDOW_XLATE | PAACE_ATM_PAGE_XLATE)
+#define PAACE_WIN_TWBAL			0xfffff000
+#define PAACE_WIN_TWBAL_SHIFT		12
+#define PAACE_WIN_SWSE			0x00000fc0
+#define PAACE_WIN_SWSE_SHIFT		6
+
+#define PAACE_AF_AP			0x00000018
+#define PAACE_AF_AP_SHIFT		3
+#define PAACE_AF_DD			0x00000004
+#define PAACE_AF_DD_SHIFT		2
+#define PAACE_AF_PT			0x00000002
+#define PAACE_AF_PT_SHIFT		1
+#define PAACE_AF_V			0x00000001
+#define PAACE_AF_V_SHIFT		0
+#define PPAACE_AF_WSE			0x00000fc0
+#define PPAACE_AF_WSE_SHIFT		6
+#define PPAACE_AF_MW			0x00000020
+#define PPAACE_AF_MW_SHIFT		5
+
+#define PAACE_AP_PERMS_DENIED  0x0
+#define PAACE_AP_PERMS_QUERY   0x1
+#define PAACE_AP_PERMS_UPDATE  0x2
+#define PAACE_AP_PERMS_ALL     0x3
+
+#define SPAACE_AF_LIODN			0xffff0000
+#define SPAACE_AF_LIODN_SHIFT		16
+#define PAACE_V_VALID          0x1
+
+#define set_bf(v, m, x)             (v = ((v) & ~(m)) | (((x) << \
+					(m##_SHIFT)) & (m)))
+#define get_bf(v, m)            (((v) & (m)) >> (m##_SHIFT))
+
+#define DEFAULT_NUM_SUBWINDOWS		128
+#define PAMU_PCR_OFFSET 0xc10
+#define PAMU_PCR_PE	0x40000000
+
+struct pamu_addr_tbl {
+	phys_addr_t start_addr[10];
+	phys_addr_t end_addr[10];
+	phys_size_t size[10];
+};
+
+struct paace {
+	/* PAACE Offset 0x00 */
+	uint32_t wbah;			/* only valid for Primary PAACE */
+	uint32_t addr_bitfields;	/* See P/S PAACE_AF_* */
+
+	/* PAACE Offset 0x08 */
+	/* Interpretation of first 32 bits dependent on DD above */
+	union {
+		struct {
+			/* Destination ID, see PAACE_DID_* defines */
+			uint8_t did;
+			/* Partition ID */
+			uint8_t pid;
+			/* Snoop ID */
+			uint8_t snpid;
+			/* coherency_required : 1 reserved : 7 */
+			uint8_t coherency_required; /* See PAACE_DA_* */
+		} to_host;
+		struct {
+			/* Destination ID, see PAACE_DID_* defines */
+			uint8_t  did;
+			uint8_t  reserved1;
+			uint16_t reserved2;
+		} to_io;
+	} domain_attr;
+
+	/* Implementation attributes + window count + address & operation
+	 * translation modes
+	 */
+	uint32_t impl_attr;			/* See PAACE_IA_* */
+
+	/* PAACE Offset 0x10 */
+	/* Translated window base address */
+	uint32_t twbah;
+	uint32_t win_bitfields;			/* See PAACE_WIN_* */
+
+	/* PAACE Offset 0x18 */
+	/* first secondary paace entry */
+	uint32_t fspi;			/* only valid for Primary PAACE */
+	union {
+		struct {
+			uint8_t ioea;
+			uint8_t moea;
+			uint8_t ioeb;
+			uint8_t moeb;
+		} immed_ot;
+		struct {
+			uint16_t reserved;
+			uint16_t omi;
+		} index_ot;
+	} op_encode;
+
+	/* PAACE Offset 0x20 */
+	uint32_t reserved1[2];			/* not currently implemented */
+
+	/* PAACE Offset 0x28 */
+	uint32_t reserved2[2];			/* not currently implemented */
+
+	/* PAACE Offset 0x30 */
+	uint32_t reserved3[2];			/* not currently implemented */
+
+	/* PAACE Offset 0x38 */
+	uint32_t reserved4[2];			/* not currently implemented */
+
+};
+
+int pamu_init(void);
+void pamu_enable(void);
+void pamu_disable(void);
+int config_pamu(struct pamu_addr_tbl *tbl, int num_entries, uint32_t liodn);
+int sec_config_pamu_table(uint32_t liodn_ns, uint32_t liodn_s);
+
+#endif
diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h
index fd8aba42a5..53ca6d94d6 100644
--- a/arch/powerpc/include/asm/immap_85xx.h
+++ b/arch/powerpc/include/asm/immap_85xx.h
@@ -1935,7 +1935,6 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022)
 	u8	res24[64];
 	u32	pblsr;		/* Preboot loader status */
 	u32	pamubypenr;	/* PAMU bypass enable */
-#define FSL_CORENET_PAMU_BYPASS		0xffff0000
 	u32	dmacr1;		/* DMA control */
 	u8	res25[4];
 	u32	gensr1;		/* General status */
@@ -2774,6 +2773,21 @@ typedef struct ccsr_pme {
 	u8	res4[0x400];
 } ccsr_pme_t;
 
+struct ccsr_pamu {
+	u32 ppbah;
+	u32 ppbal;
+	u32 pplah;
+	u32 pplal;
+	u32 spbah;
+	u32 spbal;
+	u32 splah;
+	u32 splal;
+	u32 obah;
+	u32 obal;
+	u32 olah;
+	u32 olal;
+};
+
 #ifdef CONFIG_SYS_FSL_RAID_ENGINE
 struct ccsr_raide {
 	u8	res0[0x543];
@@ -2854,6 +2868,7 @@ struct ccsr_pman {
 #define CONFIG_SYS_FSL_CORENET_SERDES4_OFFSET	0xED000
 #define CONFIG_SYS_FSL_CPC_OFFSET		0x10000
 #define CONFIG_SYS_FSL_SCFG_OFFSET		0xFC000
+#define CONFIG_SYS_FSL_PAMU_OFFSET		0x20000
 #define CONFIG_SYS_MPC85xx_DMA1_OFFSET		0x100000
 #define CONFIG_SYS_MPC85xx_DMA2_OFFSET		0x101000
 #define CONFIG_SYS_MPC85xx_DMA3_OFFSET		0x102000
@@ -3067,6 +3082,8 @@ struct ccsr_pman {
 	(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_FM2_OFFSET)
 #define CONFIG_SYS_FSL_SRIO_ADDR \
 	(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_SRIO_OFFSET)
+#define CONFIG_SYS_PAMU_ADDR \
+	(CONFIG_SYS_IMMR + CONFIG_SYS_FSL_PAMU_OFFSET)
 
 #define CONFIG_SYS_PCI1_ADDR \
 	(CONFIG_SYS_IMMR + CONFIG_SYS_MPC85xx_PCI1_OFFSET)