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powerpc: fix 8xx and 82xx type-punning warnings with GCC 4.7 

C99's strict aliasing rules are insane to use in low-level code such as a
bootloader, but as Wolfgang has rejected -fno-strict-aliasing in the
past, add a union so that 16-bit accesses can be performed.

Compile-tested only.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Acked-by: Wolfgang Denk <wd@denx.de>
This commit is contained in:
Scott Wood 2013-05-17 20:01:54 -05:00 committed by Wolfgang Denk
parent e1208c2fe5
commit a166fbca20
11 changed files with 39 additions and 23 deletions
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2
arch/powerpc/cpu/mpc8260/commproc.c
View File

@ -43,7 +43,7 @@ m8260_cpm_reset(void)
} while ((immr->im_cpm.cp_cpcr & CPM_CR_FLG) && ++count < 1000000);
#ifdef CONFIG_HARD_I2C
*((unsigned short*)(&immr->im_dprambase[PROFF_I2C_BASE])) = 0;
immr->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)] = 0;
#endif
}

2
arch/powerpc/cpu/mpc8260/cpu.c
View File

@ -106,7 +106,7 @@ int checkcpu (void)
* in the mask.
*/
m = immr & (IMMR_PARTNUM_MSK | IMMR_MASKNUM_MSK);
k = *((ushort *) & immap->im_dprambase[PROFF_REVNUM]);
k = immap->im_dprambase16[PROFF_REVNUM / sizeof(u16)];
switch (m) {
case 0x0000:

8
arch/powerpc/cpu/mpc8260/i2c.c
View File

@ -221,14 +221,14 @@ void i2c_init(int speed, int slaveadd)
i2c_init_board();
#endif
dpaddr = *((unsigned short *) (&immap->im_dprambase[PROFF_I2C_BASE]));
dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
if (dpaddr == 0) {
/* need to allocate dual port ram */
dpaddr = m8260_cpm_dpalloc(64 +
(NUM_RX_BDS * sizeof(I2C_BD)) +
(NUM_TX_BDS * sizeof(I2C_BD)) +
MAX_TX_SPACE, 64);
*((unsigned short *)(&immap->im_dprambase[PROFF_I2C_BASE])) =
immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)] =
dpaddr;
}
@ -305,7 +305,7 @@ void i2c_newio(i2c_state_t *state)
debug("[I2C] i2c_newio\n");
dpaddr = *((unsigned short *)(&immap->im_dprambase[PROFF_I2C_BASE]));
dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
iip = (iic_t *)&immap->im_dprambase[dpaddr];
state->rx_idx = 0;
state->tx_idx = 0;
@ -480,7 +480,7 @@ int i2c_doio(i2c_state_t *state)
return I2CERR_QUEUE_EMPTY;
}
dpaddr = *((unsigned short *)(&immap->im_dprambase[PROFF_I2C_BASE]));
dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
iip = (iic_t *)&immap->im_dprambase[dpaddr];
iip->iic_rbptr = iip->iic_rbase;
iip->iic_tbptr = iip->iic_tbase;

4
arch/powerpc/cpu/mpc8260/serial_smc.c
View File

@ -105,7 +105,7 @@ static int mpc8260_smc_serial_init(void)
/* initialize pointers to SMC */
sp = (smc_t *) &(im->im_smc[SMC_INDEX]);
*(ushort *)(&im->im_dprambase[PROFF_SMC_BASE]) = PROFF_SMC;
im->im_dprambase16[PROFF_SMC_BASE / sizeof(u16)] = PROFF_SMC;
up = (smc_uart_t *)&im->im_dprambase[PROFF_SMC];
/* Disable transmitter/receiver. */
@ -331,7 +331,7 @@ kgdb_serial_init (void)
/* initialize pointers to SMC */
sp = (smc_t *) &(im->im_smc[KGDB_SMC_INDEX]);
*(ushort *)(&im->im_dprambase[KGDB_PROFF_SMC_BASE]) = KGDB_PROFF_SMC;
im->im_dprambase16[KGDB_PROFF_SMC_BASE / sizeof(u16)] = KGDB_PROFF_SMC;
up = (smc_uart_t *)&im->im_dprambase[KGDB_PROFF_SMC];
/* Disable transmitter/receiver. */

2
arch/powerpc/cpu/mpc8260/spi.c
View File

@ -146,7 +146,7 @@ void spi_init_f (void)
immr = (immap_t *) CONFIG_SYS_IMMR;
cp = (cpm8260_t *) &immr->im_cpm;
*(ushort *)(&immr->im_dprambase[PROFF_SPI_BASE]) = PROFF_SPI;
immr->im_dprambase16[PROFF_SPI_BASE / sizeof(u16)] = PROFF_SPI;
spi = (spi_t *)&immr->im_dprambase[PROFF_SPI];
/* 1 */

12
arch/powerpc/cpu/mpc8xx/cpu.c
View File

@ -78,7 +78,8 @@ static int check_CPU (long clock, uint pvr, uint immr)
if ((pvr >> 16) != 0x0050)
return -1;
k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
k = (immr << 16) |
immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
m = 0;
suf = "";
@ -194,7 +195,8 @@ static int check_CPU (long clock, uint pvr, uint immr)
if ((pvr >> 16) != 0x0050)
return -1;
k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
k = (immr << 16) |
immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
m = 0;
switch (k) {
@ -253,7 +255,8 @@ static int check_CPU (long clock, uint pvr, uint immr)
if ((pvr >> 16) != 0x0050)
return -1;
k = (immr << 16) | in_be16((ushort *)&immap->im_cpm.cp_dparam[0xB0]);
k = (immr << 16) |
in_be16(&immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)]);
m = 0;
switch (k) {
@ -312,7 +315,8 @@ static int check_CPU (long clock, uint pvr, uint immr)
if ((pvr >> 16) != 0x0050)
return -1;
k = (immr << 16) | *((ushort *) & immap->im_cpm.cp_dparam[0xB0]);
k = (immr << 16) |
immap->im_cpm.cp_dparam16[PROFF_REVNUM / sizeof(u16)];
m = 0;
switch (k) {

7
arch/powerpc/include/asm/8xx_immap.h
View File

@ -485,7 +485,12 @@ typedef struct comm_proc {
* Some processors don't have all of it populated.
*/
u_char cp_dpmem[0x1C00]; /* BD / Data / ucode */
u_char cp_dparam[0x400]; /* Parameter RAM */
/* Parameter RAM */
union {
u_char cp_dparam[0x400];
u16 cp_dparam16[0x200];
};
} cpm8xx_t;
/* Internal memory map.

19
arch/powerpc/include/asm/immap_8260.h
View File

@ -526,13 +526,18 @@ typedef struct immap {
/* Some references are into the unique and known dpram spaces,
* others are from the generic base.
*/
#define im_dprambase im_dpram1
u_char im_dpram1[16*1024];
char res1[16*1024];
u_char im_dpram2[4*1024];
char res2[8*1024];
u_char im_dpram3[4*1024];
char res3[16*1024];
union {
struct {
u_char im_dpram1[16 * 1024];
char res1[16 * 1024];
u_char im_dpram2[4 * 1024];
char res2[8 * 1024];
u_char im_dpram3[4 * 1024];
char res3[16 * 1024];
};
u8 im_dprambase[64 * 1024];
u16 im_dprambase16[32 * 1024];
};
sysconf8260_t im_siu_conf; /* SIU Configuration */
memctl8260_t im_memctl; /* Memory Controller */

2
common/cmd_immap.c
View File

@ -535,7 +535,7 @@ do_i2cinfo (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
volatile iic_t *iip;
uint dpaddr;
dpaddr = *((unsigned short *) (&immap->im_dprambase[PROFF_I2C_BASE]));
dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
if (dpaddr == 0)
iip = NULL;
else

3
examples/standalone/mem_to_mem_idma2intr.c
View File

@ -309,7 +309,8 @@ int idma_init (void)
memaddr = dpalloc (sizeof (pram_idma_t), 64);
*(volatile ushort *) &immap->im_dprambase[PROFF_IDMA2_BASE] = memaddr;
*(volatile u16 *)&immap->im_dprambase16
[PROFF_IDMA2_BASE / sizeof(u16)] = memaddr;
piptr = (volatile pram_idma_t *) ((uint) (immap) + memaddr);
piptr->pi_resv1 = 0; /* manual says: clear it */

1
include/commproc.h
View File

@ -127,6 +127,7 @@ typedef struct cpm_buf_desc {
*/
#define PROFF_SCC1 ((uint)0x0000)
#define PROFF_IIC ((uint)0x0080)
#define PROFF_REVNUM ((uint)0x00b0)
#define PROFF_SCC2 ((uint)0x0100)
#define PROFF_SPI ((uint)0x0180)
#define PROFF_SCC3 ((uint)0x0200)