[U-Boot] [PATCH v2 09/10] armv7: adapt omap3 to the new cache maintenance framework

Aneesh V
2011-03-08T13:07:37Z

adapt omap3 to the new layered cache maintenance framework

Signed-off-by: Aneesh V <aneesh@ti.com>
---
arch/arm/cpu/armv7/omap3/Makefile | 1 -
arch/arm/cpu/armv7/omap3/board.c | 138 ++++++++++++--
arch/arm/cpu/armv7/omap3/cache.S | 263 ---------------------------
arch/arm/cpu/armv7/omap3/lowlevel_init.S | 32 ++++
arch/arm/include/asm/arch-omap3/omap3.h | 20 ++
arch/arm/include/asm/arch-omap3/sys_proto.h | 10 +-
6 files changed, 178 insertions(+), 286 deletions(-)
delete mode 100644 arch/arm/cpu/armv7/omap3/cache.S

diff --git a/arch/arm/cpu/armv7/omap3/Makefile b/arch/arm/cpu/armv7/omap3/Makefile
index 7164d50..522bcd2 100644
--- a/arch/arm/cpu/armv7/omap3/Makefile
+++ b/arch/arm/cpu/armv7/omap3/Makefile
@@ -26,7 +26,6 @@ include $(TOPDIR)/config.mk
LIB = $(obj)lib$(SOC).o

SOBJS := lowlevel_init.o
-SOBJS += cache.o

COBJS += board.o
COBJS += clock.o
diff --git a/arch/arm/cpu/armv7/omap3/board.c b/arch/arm/cpu/armv7/omap3/board.c
index 6c2a132..39866e0 100644
--- a/arch/arm/cpu/armv7/omap3/board.c
+++ b/arch/arm/cpu/armv7/omap3/board.c
@@ -37,8 +37,12 @@
#include <asm/arch/sys_proto.h>
#include <asm/arch/mem.h>
#include <asm/cache.h>
+#include <asm/armv7.h>

+/* Declarations */
extern omap3_sysinfo sysinfo;
+static void omap3_setup_aux_cr(void);
+static void omap3_invalidate_l2_cache_secure(void);

/******************************************************************************
* Routine: delay
@@ -166,27 +170,13 @@ void s_init(void)

try_unlock_memory();

- /*
- * Right now flushing at low MPU speed.
- * Need to move after clock init
- */
- invalidate_dcache(get_device_type());
-#ifndef CONFIG_ICACHE_OFF
- icache_enable();
-#endif
+ /* Errata workarounds */
+ omap3_setup_aux_cr();

-#ifdef CONFIG_L2_OFF
- l2_cache_disable();
-#else
- l2_cache_enable();
+#ifndef CONFIG_SYS_NO_L2CACHE
+ /* Invalidate L2-cache from secure mode */
+ omap3_invalidate_l2_cache_secure();
#endif
- /*
- * Writing to AuxCR in U-boot using SMI for GP DEV
- * Currently SMI in Kernel on ES2 devices seems to have an issue
- * Once that is resolved, we can postpone this config to kernel
- */
- if (get_device_type() == GP_DEVICE)
- setup_auxcr();

set_muxconf_regs();
delay(100);
@@ -292,3 +282,113 @@ int checkboard (void)
return 0;
}
#endif /* CONFIG_DISPLAY_BOARDINFO */
+
+static void omap3_emu_romcode_call(u32 service_id, u32 *parameters)
+{
+ u32 i, num_params = *parameters;
+ u32 *sram_scratch_space = (u32 *)OMAP3_PUBLIC_SRAM_SCRATCH_AREA;
+
+ /*
+ * copy the parameters to an un-cached area to avoid coherency
+ * issues
+ */
+ for (i = 0; i < num_params; i++) {
+ __raw_writel(*parameters, sram_scratch_space);
+ parameters++;
+ sram_scratch_space++;
+ }
+
+ /* Now make the PPA call */
+ do_omap3_emu_romcode_call(service_id, OMAP3_PUBLIC_SRAM_SCRATCH_AREA);
+}
+
+static void omap3_update_aux_cr_secure(u32 set_bits, u32 clear_bits)
+{
+ u32 acr;
+
+ /* Read ACR */
+ asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
+ acr &= ~clear_bits;
+ acr |= set_bits;
+
+ if (get_device_type() == GP_DEVICE) {
+ omap3_gp_romcode_call(OMAP3_GP_ROMCODE_API_WRITE_ACR,
+ acr);
+ } else {
+ struct emu_hal_params emu_romcode_params;
+ emu_romcode_params.num_params = 1;
+ emu_romcode_params.param1 = acr;
+ omap3_emu_romcode_call(OMAP3_EMU_HAL_API_WRITE_ACR,
+ (u32 *)&emu_romcode_params);
+ }
+}
+
+static void omap3_update_aux_cr(u32 set_bits, u32 clear_bits)
+{
+ u32 acr;
+
+ /* Read ACR */
+ asm volatile ("mrc p15, 0, %0, c1, c0, 1" : "=r" (acr));
+ acr &= ~clear_bits;
+ acr |= set_bits;
+
+ /* Write ACR - affects non-secure banked bits */
+ asm volatile ("mcr p15, 0, %0, c1, c0, 1" : : "r" (acr));
+}
+
+static void omap3_setup_aux_cr(void)
+{
+ /* Workaround for Cortex-A8 errata: #454179 #430973
+ * Set "IBE" bit
+ * Set "Disable Brach Size Mispredicts" bit
+ * Workaround for erratum #621766
+ * Enable L1NEON bit
+ * ACR |= (IBE | DBSM | L1NEON) => ACR |= 0xE0
+ */
+ omap3_update_aux_cr_secure(0xE0, 0);
+}
+
+#if !defined(CONFIG_SYS_NO_DCACHE) && !defined(CONFIG_SYS_NO_L2CACHE)
+
+/* Invalidate the entire L2 cache from secure mode */
+static void omap3_invalidate_l2_cache_secure(void)
+{
+ if (get_device_type() == GP_DEVICE) {
+ omap3_gp_romcode_call(OMAP3_GP_ROMCODE_API_L2_INVAL,
+ 0);
+ } else {
+ struct emu_hal_params emu_romcode_params;
+ emu_romcode_params.num_params = 1;
+ emu_romcode_params.param1 = 0;
+ omap3_emu_romcode_call(OMAP3_EMU_HAL_API_L2_INVAL,
+ (u32 *)&emu_romcode_params);
+ }
+}
+
+void v7_outer_cache_enable(void)
+{
+ /* Set L2EN */
+ omap3_update_aux_cr_secure(0x2, 0);
+
+ /*
+ * On some revisions L2EN bit is banked on some revisions it's not
+ * No harm in setting both banked bits(in fact this is required
+ * by an erratum)
+ */
+ omap3_update_aux_cr(0x2, 0);
+}
+
+void v7_outer_cache_disable(void)
+{
+ /* Clear L2EN */
+ omap3_update_aux_cr_secure(0, 0x2);
+
+ /*
+ * On some revisions L2EN bit is banked on some revisions it's not
+ * No harm in clearing both banked bits(in fact this is required
+ * by an erratum)
+ */
+ omap3_update_aux_cr(0, 0x2);
+}
+
+#endif
diff --git a/arch/arm/cpu/armv7/omap3/cache.S b/arch/arm/cpu/armv7/omap3/cache.S
deleted file mode 100644
index cda87ba..0000000
--- a/arch/arm/cpu/armv7/omap3/cache.S
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
- * Copyright (c) 2009 Wind River Systems, Inc.
- * Tom Rix <Tom.Rix@windriver.com>
- *
- * This file is based on and replaces the existing cache.c file
- * The copyrights for the cache.c file are:
- *
- * (C) Copyright 2008 Texas Insturments
- *
- * (C) Copyright 2002
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger@sysgo.de>
- *
- * (C) Copyright 2002
- * Gary Jennejohn, DENX Software Engineering, <gj@denx.de>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
- */
-
-#include <asm/arch/omap3.h>
-
-/*
- * omap3 cache code
- */
-
-.align 5
-.global invalidate_dcache
-.global l2_cache_enable
-.global l2_cache_disable
-.global setup_auxcr
-
-/*
- * invalidate_dcache()
- *
- * Invalidate the whole D-cache.
- *
- * Corrupted registers: r0-r5, r7, r9-r11
- *
- * - mm - mm_struct describing address space
- */
-invalidate_dcache:
- stmfd r13!, {r0 - r5, r7, r9 - r12, r14}
-
- mov r7, r0 @ take a backup of device type
- cmp r0, #0x3 @ check if the device type is
- @ GP
- moveq r12, #0x1 @ set up to invalide L2
-smi: .word 0x01600070 @ Call SMI monitor (smieq)
- cmp r7, #0x3 @ compare again in case its
- @ lost
- beq finished_inval @ if GP device, inval done
- @ above
-
- mrc p15, 1, r0, c0, c0, 1 @ read clidr
- ands r3, r0, #0x7000000 @ extract loc from clidr
- mov r3, r3, lsr #23 @ left align loc bit field
- beq finished_inval @ if loc is 0, then no need to
- @ clean
- mov r10, #0 @ start clean at cache level 0
-inval_loop1:
- add r2, r10, r10, lsr #1 @ work out 3x current cache
- @ level
- mov r1, r0, lsr r2 @ extract cache type bits from
- @ clidr
- and r1, r1, #7 @ mask of the bits for current
- @ cache only
- cmp r1, #2 @ see what cache we have at
- @ this level
- blt skip_inval @ skip if no cache, or just
- @ i-cache
- mcr p15, 2, r10, c0, c0, 0 @ select current cache level
- @ in cssr
- mov r2, #0 @ operand for mcr SBZ
- mcr p15, 0, r2, c7, c5, 4 @ flush prefetch buffer to
- @ sych the new cssr&csidr,
- @ with armv7 this is 'isb',
- @ but we compile with armv5
- mrc p15, 1, r1, c0, c0, 0 @ read the new csidr
- and r2, r1, #7 @ extract the length of the
- @ cache lines
- add r2, r2, #4 @ add 4 (line length offset)
- ldr r4, =0x3ff
- ands r4, r4, r1, lsr #3 @ find maximum number on the
- @ way size
- clz r5, r4 @ find bit position of way
- @ size increment
- ldr r7, =0x7fff
- ands r7, r7, r1, lsr #13 @ extract max number of the
- @ index size
-inval_loop2:
- mov r9, r4 @ create working copy of max
- @ way size
-inval_loop3:
- orr r11, r10, r9, lsl r5 @ factor way and cache number
- @ into r11
- orr r11, r11, r7, lsl r2 @ factor index number into r11
- mcr p15, 0, r11, c7, c6, 2 @ invalidate by set/way
- subs r9, r9, #1 @ decrement the way
- bge inval_loop3
- subs r7, r7, #1 @ decrement the index
- bge inval_loop2
-skip_inval:
- add r10, r10, #2 @ increment cache number
- cmp r3, r10
- bgt inval_loop1
-finished_inval:
- mov r10, #0 @ swith back to cache level 0
- mcr p15, 2, r10, c0, c0, 0 @ select current cache level
- @ in cssr
- mcr p15, 0, r10, c7, c5, 4 @ flush prefetch buffer,
- @ with armv7 this is 'isb',
- @ but we compile with armv5
-
- ldmfd r13!, {r0 - r5, r7, r9 - r12, pc}
-
-l2_cache_set:
- stmfd r13!, {r4 - r6, lr}
- mov r5, r0
- bl get_cpu_rev
- mov r4, r0
- bl get_cpu_family
- @ ES2 onwards we can disable/enable L2 ourselves
- cmp r0, #CPU_OMAP34XX
- cmpeq r4, #CPU_3XX_ES10
- mrc 15, 0, r0, cr1, cr0, 1
- bic r0, r0, #2
- orr r0, r0, r5, lsl #1
- mcreq 15, 0, r0, cr1, cr0, 1
- @ GP Device ROM code API usage here
- @ r12 = AUXCR Write function and r0 value
- mov ip, #3
- @ SMCNE instruction to call ROM Code API
- .word 0x11600070
- ldmfd r13!, {r4 - r6, pc}
-
-l2_cache_enable:
- mov r0, #1
- b l2_cache_set
-
-l2_cache_disable:
- mov r0, #0
- b l2_cache_set
-
-/******************************************************************************
- * Routine: setup_auxcr()
- * Description: Write to AuxCR desired value using SMI.
- * general use.
- *****************************************************************************/
-setup_auxcr:
- mrc p15, 0, r0, c0, c0, 0 @ read main ID register
- and r2, r0, #0x00f00000 @ variant
- and r3, r0, #0x0000000f @ revision
- orr r1, r3, r2, lsr #20-4 @ combine variant and revision
- mov r12, #0x3
- mrc p15, 0, r0, c1, c0, 1
- orr r0, r0, #0x10 @ Enable ASA
- @ Enable L1NEON on pre-r2p1 (erratum 621766 workaround)
- cmp r1, #0x21
- orrlt r0, r0, #1 << 5
- .word 0xE1600070 @ SMC
- mov r12, #0x2
- mrc p15, 1, r0, c9, c0, 2
- @ Set PLD_FWD bit in L2AUXCR on pre-r2p1 (erratum 725233 workaround)
- cmp r1, #0x21
- orrlt r0, r0, #1 << 27
- .word 0xE1600070 @ SMC
- bx lr
-
-.align 5
-.global v7_flush_dcache_all
-.global v7_flush_cache_all
-
-/*
- * v7_flush_dcache_all()
- *
- * Flush the whole D-cache.
- *
- * Corrupted registers: r0-r7, r9-r11 (r6 only in Thumb mode)
- *
- * - mm - mm_struct describing address space
- */
-v7_flush_dcache_all:
-# dmb @ ensure ordering with previous memory accesses
- mrc p15, 1, r0, c0, c0, 1 @ read clidr
- ands r3, r0, #0x7000000 @ extract loc from clidr
- mov r3, r3, lsr #23 @ left align loc bit field
- beq finished @ if loc is 0, then no need to clean
- mov r10, #0 @ start clean at cache level 0
-loop1:
- add r2, r10, r10, lsr #1 @ work out 3x current cache level
- mov r1, r0, lsr r2 @ extract cache type bits from clidr
- and r1, r1, #7 @ mask of the bits for current cache only
- cmp r1, #2 @ see what cache we have@this level
- blt skip @ skip if no cache, or just i-cache
- mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr
- mcr p15, 0, r10, c7, c5, 4 @ flush prefetch buffer,
- @ with armv7 this is 'isb',
- @ but we compile with armv5
- mrc p15, 1, r1, c0, c0, 0 @ read the new csidr
- and r2, r1, #7 @ extract the length of the cache lines
- add r2, r2, #4 @ add 4 (line length offset)
- ldr r4, =0x3ff
- ands r4, r4, r1, lsr #3 @ find maximum number on the way size
- clz r5, r4 @ find bit position of way size increment
- ldr r7, =0x7fff
- ands r7, r7, r1, lsr #13 @ extract max number of the index size
-loop2:
- mov r9, r4 @ create working copy of max way size
-loop3:
- orr r11, r10, r9, lsl r5 @ factor way and cache number into r11
- orr r11, r11, r7, lsl r2 @ factor index number into r11
- mcr p15, 0, r11, c7, c14, 2 @ clean & invalidate by set/way
- subs r9, r9, #1 @ decrement the way
- bge loop3
- subs r7, r7, #1 @ decrement the index
- bge loop2
-skip:
- add r10, r10, #2 @ increment cache number
- cmp r3, r10
- bgt loop1
-finished:
- mov r10, #0 @ swith back to cache level 0
- mcr p15, 2, r10, c0, c0, 0 @ select current cache level in cssr
-# dsb
- mcr p15, 0, r10, c7, c5, 4 @ flush prefetch buffer,
- @ with armv7 this is 'isb',
- @ but we compile with armv5
- mov pc, lr
-
-/*
- * v7_flush_cache_all()
- *
- * Flush the entire cache system.
- * The data cache flush is now achieved using atomic clean / invalidates
- * working outwards from L1 cache. This is done using Set/Way based cache
- * maintainance instructions.
- * The instruction cache can still be invalidated back to the point of
- * unification in a single instruction.
- *
- */
-v7_flush_cache_all:
- stmfd sp!, {r0-r7, r9-r11, lr}
- bl v7_flush_dcache_all
- mov r0, #0
- mcr p15, 0, r0, c7, c5, 0 @ I+BTB cache invalidate
- ldmfd sp!, {r0-r7, r9-r11, lr}
- mov pc, lr
diff --git a/arch/arm/cpu/armv7/omap3/lowlevel_init.S b/arch/arm/cpu/armv7/omap3/lowlevel_init.S
index 109481e..dfb515b 100644
--- a/arch/arm/cpu/armv7/omap3/lowlevel_init.S
+++ b/arch/arm/cpu/armv7/omap3/lowlevel_init.S
@@ -35,6 +35,38 @@
_TEXT_BASE:
.word CONFIG_SYS_TEXT_BASE /* sdram load addr from config.mk */

+.global omap3_gp_romcode_call
+omap3_gp_romcode_call:
+ PUSH {r4-r12, lr} @ Save all registers from ROM code!
+ MOV r12, r0 @ Copy the Service ID in R12
+ MOV r0, r1 @ Copy parameter to R0
+ mcr p15, 0, r0, c7, c10, 4 @ DSB
+ mcr p15, 0, r0, c7, c10, 5 @ DMB
+ .word 0xe1600070 @ SMC #0 to enter monitor - hand assembled
+ @ because we use -march=armv5
+ POP {r4-r12, pc}
+
+/*
+ * Funtion for making PPA HAL API calls in secure devices
+ * Input:
+ * R0 - Service ID
+ * R1 - paramer list
+ */
+.global do_omap3_emu_romcode_call
+do_omap3_emu_romcode_call:
+ PUSH {r4-r12, lr} @ Save all registers from ROM code!
+ MOV r12, r0 @ Copy the Secure Service ID in R12
+ MOV r3, r1 @ Copy the pointer to va_list in R3
+ MOV r1, #0 @ Process ID - 0
+ MOV r2, #OMAP3_EMU_HAL_START_HAL_CRITICAL @ Copy the pointer
+ @ to va_list in R3
+ MOV r6, #0xFF @ Indicate new Task call
+ mcr p15, 0, r0, c7, c10, 4 @ DSB
+ mcr p15, 0, r0, c7, c10, 5 @ DMB
+ .word 0xe1600071 @ SMC #1 to call PPA service - hand assembled
+ @ because we use -march=armv5
+ POP {r4-r12, pc}
+
#if !defined(CONFIG_SYS_NAND_BOOT) && !defined(CONFIG_SYS_NAND_BOOT)
/**************************************************************************
* cpy_clk_code: relocates clock code into SRAM where its safer to execute
diff --git a/arch/arm/include/asm/arch-omap3/omap3.h b/arch/arm/include/asm/arch-omap3/omap3.h
index 3957c79..7b861a3 100644
--- a/arch/arm/include/asm/arch-omap3/omap3.h
+++ b/arch/arm/include/asm/arch-omap3/omap3.h
@@ -145,8 +145,14 @@ struct gpio {
#define SRAM_VECT_CODE (SRAM_OFFSET0 | SRAM_OFFSET1 | \
SRAM_OFFSET2)

+#define OMAP3_PUBLIC_SRAM_BASE 0x40208000 /* Works for GP & EMU */
+#define OMAP3_PUBLIC_SRAM_END 0x40210000
+
#define LOW_LEVEL_SRAM_STACK 0x4020FFFC

+/* scratch area - accessible on both EMU and GP */
+#define OMAP3_PUBLIC_SRAM_SCRATCH_AREA OMAP3_PUBLIC_SRAM_BASE
+
#define DEBUG_LED1 149 /* gpio */
#define DEBUG_LED2 150 /* gpio */

@@ -213,4 +219,18 @@ struct gpio {

#define OMAP3730 0x0c00

+/*
+ * ROM code API related flags
+ */
+#define OMAP3_GP_ROMCODE_API_L2_INVAL 1
+#define OMAP3_GP_ROMCODE_API_WRITE_ACR 3
+
+/*
+ * EMU device PPA HAL related flags
+ */
+#define OMAP3_EMU_HAL_API_L2_INVAL 40
+#define OMAP3_EMU_HAL_API_WRITE_ACR 42
+
+#define OMAP3_EMU_HAL_START_HAL_CRITICAL 4
+
#endif
diff --git a/arch/arm/include/asm/arch-omap3/sys_proto.h b/arch/arm/include/asm/arch-omap3/sys_proto.h
index 4a28ba1..995e7cb 100644
--- a/arch/arm/include/asm/arch-omap3/sys_proto.h
+++ b/arch/arm/include/asm/arch-omap3/sys_proto.h
@@ -27,6 +27,11 @@ typedef struct {
char *nand_string;
} omap3_sysinfo;

+struct emu_hal_params {
+ u32 num_params;
+ u32 param1;
+};
+
void prcm_init(void);
void per_clocks_enable(void);

@@ -53,9 +58,7 @@ u32 is_running_in_sdram(void);
u32 is_running_in_sram(void);
u32 is_running_in_flash(void);
u32 get_device_type(void);
-void l2cache_enable(void);
void secureworld_exit(void);
-void setup_auxcr(void);
void try_unlock_memory(void);
u32 get_boot_type(void);
void invalidate_dcache(u32);
@@ -66,5 +69,6 @@ void make_cs1_contiguous(void);
void omap_nand_switch_ecc(int);
void power_init_r(void);
void dieid_num_r(void);
-
+void do_omap3_emu_romcode_call(u32 service_id, u32 parameters);
+void omap3_gp_romcode_call(u32 service_id, u32 parameter);
#endif
--
1.7.0.4